Only the feeble minded would convert to a death cult....
Unfortunately -- and I may get flamed for this -- there are more feeble-minded people out there than you think: flakes, psychopaths, & lost souls who might end up gravitating toward Islam. As was said above, look at the European youth. A pretty lost, decadent bunch.
For that matter, look at John Lingh (name correct?), that American from Marin County who joined the Taliban. Parents divorced (father gay), looney liberal. I hate to say it, but these are the types that are going to get seduced by Islam's close-knit, though insidious, world.
As much as I find the book above a lot of drivel, there is a scary grain of truth in it. I am very afraid for the future.