The completion of a new mosque in Amsterdam is doing more than opening the doors of worship to Dutch Muslims; it is opening new windows into unexpected avenues of terrorist financing and funding for the growth of radical Islam in the West.

For years, Western counterterrorism officials and pundits have expressed concern about the sponsorship of European and American mosques, Islamic schools, and other Muslim organizations by the Saudi government in efforts to expand its own extremist version of Islam, Wahhabism. Wahhabis adhere to strict, literal interpretations of the Quran and defend the use of violence against those who do not – Muslims and non-Muslims alike.

Now, however, it seems we've been so focused on the Saudis, we may have missed a potentially even greater source of radicalization, and certainly a fast-growing one: the Muslim Brotherhood. And the government of Kuwait, with ties to al-Qaida groups and Hamas, appears to be among the largest financiers of Brotherhood infiltration into Europe.

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