Is Oklahoma the Christian version of ISIS controlled territory?
The guy was a Muslim.
I'm not sure this had much to do with religion though. Sounds like he got fired, totally lost it, and just attacked someone in a fit of insane rage. I wouldn't be surprised if he had nutty religious views that he used to justify it to himself, but anyone that unstable is probably going to end up attacking someone anyway.
Reports are filing in that he had been attempting to convert people for quite some time. I don't doubt anyone who would behead a co-worker is loony, but religion obviously played a role in pushing him over the edge, as it often does.
But, of course, we will do the usual Atlas thing and remember that all religion is good and wholesome and wonderful and big, fat meanies like memphis, opebo (RIP), and myself should refrain from hurting feelings.