That's a simplistic way of looking at the problem. Evidently there's something pathologically wrong with society in general, given the increase in the number of alienated, and frustrated, young men and women being drawn to extreme positions and becoming radicalised to the extent of murdering people.
They're alienated, frustrated and the support structures (family community, etc.) no longer exist to reign these people in.
too many rats in a cage and they will start to eat each other. and its a small world now.