‘If there is no God then all is permitted.’
radical Muslims fervently believe in the Abrahamic God; I’ve not noticed much restraint in their barbarity due to that belief...
I don’t think threats of future fire and brimstone are going to stop a young man willing to die at the hand of immediate antagonists...
This individual did not face immediate antagonist.
He could be fairly certain that he would not face an armed opponent. He was walking in to a Gun Free Zone.
He seemed to have a plan of escape as well. Fear of punishment of the earthly variety at least seemed to have entered in to his thoughts.