Seems like a lot of the families, friends and employers are shocked at the radicalization of some of these youths. They operate just like the cults did here, back in their heyday...
I'll just put this here. You can watch the whole thing or skip to 2:22 get to point...
ETA: A study conducted by the Pew Research Center in 2010 and released January 2011 found that there are 1.62 billion muslims around the world, and it is estimated that the sunni population is between 75% and 90%. Perhaps this is why there is so much silence surrounding the abhorrent violence so common in the 'religion of pieces'...