Here is an article from the English edition of the Frankfurter Allgemeine Zeitung, (thanks to Ali Dashti) about German converts to Islam (including a bit about the eminent Ahmad Von Denffer, whose Ulum ul-Qur’an is a handy reference on Qur’anic interpretation; I quote it several times in Onward Muslim Soldiers). It ably details the alienation from the West and anti-Semitism that motivates them.
It doesn’t, however, mention the fact that they are easy prey for radicals because those radicals can appeal to the obvious literal meaning of multiple texts of the Qur’an and Sunnah in order to convince them that violent jihad is a central part of their religious responsibility.