Here is a very good article from Talking Points Memo about the two teenagers caught in New Jersey trying to go to Somalia to join the Jihad against America.
This article relates these two to other outbreaks of teenage rebellion over the decades. I'd like to add my observation that, whenever a nest of juvenile "satanists" is uncovered, they are almost invariably the children of evangelical Christians.
These alienated kids pick whatever they think is most frightening and abominable to their parents, as the best way to get back at them; their particular choice, be it satanist, neo-nazi, belligerent rapper or would-be Islamic terrorist. That doesn't mean that, with the right assistance, they couldn't do something truly horrible; but it would be wise not to draw too many conclusions from their behavior.