Really? No idea? Well, I've got a pretty good idea what set him on a murderous rampage. Same thing that has lead to literally tens of thousands of attacks across the globe over the past few years. The same thing that is causing similar attacks in Israel and across Europe, and now here in the US. It is long past time for the civilized world to wake the {expletive} up and realize there is a violent death cult masquerading as a religion.
Sounds like the family is gonna lawyer up and sue someone with money for their crazy relative’s killing spree....Only in America....