Could be vanity, not just cuckism. Imagine yourself being big shot police inspector, solving difficult cases and making psycho profiles of killers. Tracking them, doing detective work. All of us a sudden, them interesting killers are replaced by ordinary people listening to word of preachers to kill infidels. That simple. No special motives, no violent background, no childhood abuse, nothing juicy or interesting to show off your investigator skills. Only thing left for you is to get in front of camera and say, it is another pawn of Islamic State. They can put anyone in front of camera to do the exact same thing. Sucks, doesn't it. Therefore you will lie to yourself and claim it is something more complicated, when really it ain't. Partly because your feelings are hurt, also to save your ass in future in case global austerity measures hit your precinct.