Great idea for a thread, though the material is a bit extensive and its unlikely any will read the whole report. I read the conclusion and maybe I'll get around to reading the whole thing sometime later. Here's one interesting bit from the conclusion.
The threat seems larger from radicalized citizens than from migrants. The again, I'd imagine migrants would be a minority of Muslims in many of these countries so they could still be over-represented among these terrorists despite not being the majority.