Today’s “The Western Journal,” that august organ of journalism which you cite here, also features such headlines as “Demonic Compulsion: School Ran Weekly Witchcraft Address, Shut It Down Once They Couldn't Force It on Christians Anymore.”
It saddens me to think that this kind of thing is permeating into HN.
Please see the primary source I just included as reference [2]. You don't need to trust the western journal. You can read the shooter's letter, in his own handwriting.
In truth, he's more of a political nutcase than a political activist.