For years, Europe has treated transnational Islamist networks as a collection of domestic administrative problems. A questionable charity in London was a matter for the Charity Commission. A foundation in Germany belonged to the intelligence services. A cultural association in France was handled under French law. A commercial company in Türkiye was somebody else’s jurisdiction. Provided that each individual organisation maintained a sufficiently respectable façade, nobody was required to examine the system as a whole. Washington has now begun to do precisely that. The sanctions announced by the US Treasury on July 23 are significant not simply because they target another alleged financier of Hamas, but because of the architecture they describe. The Office of Foreign Assets Control designated Mahmoud al-Abyari, a senior Egyptian Muslim Brotherhood figure based in Britain, together with three other individuals and three entities accused of providing material support to Hamas. According to the Treasury, al-Abyari is secretary-general of the Muslim Brotherhood General Secretariat and helped raise funds for organisations previously sanctioned for their Hamas connections. The other targets illustrate the geography and versatility of the network. They include two organisations in Indonesia and Gaza that Washington describes as Hamas-created fundraising fronts, and a Turkish commercial company accused of transferring hundreds of thousands of dollars while providing underground banking services involving both conventional currencies and cryptocurrencies. The same Turkish operation allegedly serviced organised crime groups in Sweden. This is not a local cell. It is an ecosystem.

Its component parts do not need to share an office, a bank account or even a formally demonstrable chain of command. One organisation collects money under the humanitarian banner. Another moves it through an informal settlement mechanism. A commercial company provides plausible transactions. A foundation supplies respectability. A senior figure provides political and organisational coordination while living safely in a European capital. Each piece, examined in isolation, may appear ambiguous. Together they form what the Treasury calls a “multi-layered” transnational financing structure. The importance of the American action lies precisely here. Washington is moving beyond the endless game of closing one front organisation after another while leaving the organisers, intermediaries and financial channels untouched. It is targeting the infrastructure that allows an organisation to regenerate every time one of its branches is exposed.

This reflects the changing nature of terrorist financing itself. The Financial Action Task Force has warned that financing operations are becoming more decentralised, combining regional hubs, informal transfer systems, self-financed cells, digital platforms, commercial activity and traditional fundraising. It has also highlighted the growing convergence between terrorist finance and organised crime, as well as the exploitation of charities, shell companies and non-profit organisations. The old image of terrorist finance—a wealthy patron wiring a large sum directly to a clearly identified armed group—is increasingly obsolete. Money is broken into smaller flows. Humanitarian appeals are mixed with legitimate donations. Funds pass through multiple jurisdictions and may change form several times, moving from cash to trade, from cryptocurrency to informal banking, from a registered company to an apparently respectable association. Responsibility is fragmented until everybody can plausibly claim to have seen only one harmless piece of the operation. Europe has been particularly vulnerable to this method because its legal and political systems remain national while the networks are transnational. A charity can be lawful in Britain, raise funds in Germany, cooperate with a Turkish company, communicate through servers elsewhere and ultimately support an organisation operating outside Europe. Each government sees only the fragment located within its borders. The network sees the entire map. Britain is therefore more than one jurisdiction among many. It is the first major test. Andy Burnham entered Downing Street on July 20. Three days later, Washington designated a senior Muslim Brotherhood figure operating from the United Kingdom. The timing may be accidental, but the political problem is not. Burnham’s government must now decide whether Britain intends merely to acknowledge an American sanctions decision or to investigate whether an international financial and organisational structure has been operating from London under the protection of British legality. This will not be solved by copying an OFAC list. British authorities must establish evidence under British law, determine whether domestic organisations or financial institutions were involved and distinguish genuine humanitarian activity from deliberate facilitation. That distinction is indispensable. Humanitarian organisations working in Gaza and elsewhere cannot simply be treated as presumptively criminal. But neither can the word “humanitarian” be allowed to function as a diplomatic passport protecting financial networks from examination. The FATF itself warns against indiscriminate restrictions on the non-profit sector. It calls instead for proportionate, risk-based supervision capable of protecting legitimate aid while identifying diversion and abuse. The choice is not between criminalising charity and ignoring terrorist finance. It is between serious investigation and political convenience. The Pakistan comparison is unavoidable. Pakistan spent years under FATF increased monitoring because of strategic deficiencies in its system for combating money laundering and terrorist financing. It was removed from the grey list in October 2022 after completing two action plans. Formally, the system had improved. Convictions were obtained, organisations were banned, accounts were frozen and charities associated with groups such as Lashkar-e-Taiba and Jamaat-ud-Dawa were placed under restrictions. Yet Pakistan also provided the world with the definitive manual for how terrorist infrastructure survives formal compliance.

A banned organisation becomes a welfare foundation. A welfare foundation becomes a relief campaign. Its offices change their names, its leaders acquire temporary convictions, its cadres reappear under another banner and its political patrons continue to describe the organisation as a legitimate resistance movement. The armed wing, the charity, the religious movement and the political lobby are presented as separate objects whenever separation is legally useful and as parts of the same glorious cause whenever money or recruits are needed. The relationship between Pakistani Islamist movements and Hamas does not by itself prove a Pakistani state financing operation. It does, however, reveal the political environment in which such networks can acquire legitimacy. In 2025, Jamaat-e-Islami publicly demanded that Hamas be permitted to open an office in Pakistan, while describing it as a resistance movement rather than a terrorist organisation. This is not merely rhetoric. It is the ideological preparation necessary to transform financial support into respectable solidarity and organisational cooperation into humanitarian engagement. Pakistan’s FATF experience should therefore serve as a warning to Europe rather than a model of successful box-ticking. Technical compliance can be manufactured. Organisations can be banned on paper while their social, political and financial infrastructure remains intact. The decisive question is not whether a government has passed the correct legislation. It is whether it is willing to apply that legislation to networks protected by political influence, religious legitimacy or institutional convenience. The FATF’s latest assessment goes even further. It states that state financing or resourcing of organisations engaged in terrorist acts is incompatible with FATF standards and identifies financial, logistical and material assistance, training, trade-based laundering and smuggling as methods through which state support may be concealed. Pakistan’s long history of distinguishing between useful and inconvenient militant organisations demonstrates exactly why this provision matters. A state does not need to issue a Treasury cheque to sponsor terrorism. It can provide tolerance, access, protection, political space and selective blindness. The European version is usually more decorous. It is rarely an intelligence service handing over weapons. It is a regulator unwilling to ask where the money ultimately goes; a government reluctant to confront an influential constituency; a bank satisfied by formally correct documentation; or an association permitted to move between humanitarian, political and ideological roles without serious scrutiny.

But wilful blindness is itself an enabling environment. American sanctions have immediate power because the dollar remains central to the international financial system. Assets under US jurisdiction are blocked, transactions involving US persons are prohibited, and foreign financial institutions facilitating significant dealings with sanctioned actors risk losing access to American finance. Washington can therefore force institutions outside its territory to examine relationships that European governments preferred to leave undisturbed. That is also why resentment will follow. Europeans will complain about extraterritoriality, unilateralism and the export of American definitions. Some of those objections are legally valid. But they cannot substitute for an answer to the underlying evidence. Sovereignty does not mean refusing to investigate because the Americans discovered the network first. The real shift is conceptual. Washington is no longer treating the Muslim Brotherhood’s European presence, Hamas fundraising, Turkish financial intermediaries, Asian charities and criminal money-transfer mechanisms as separate stories. It is treating them as parts of a single transnational system. Europe must now decide whether it is capable of doing the same. For Burnham, this is an unexpectedly early test. For other European capitals, it is a warning. And for Pakistan, which escaped FATF monitoring without ever fully abandoning its culture of militant utility, it should be an uncomfortable reminder: the next phase of counterterrorism will not be satisfied with banned names, ceremonial arrests and charities that merely change their letterhead.

It will follow the network.