"... Mudcatters who appear to sympathize with the killer."

I don't see this. I see some...including myself... who sympathize a bit with his situation, as I sympathize with gays & lesbians who try to serve and are treated badly by bigots.
It might be that Muslims, as well as gays & lesbians, should EITHER be exempt, or stricter attention be paid to making sure everyone is treated fairly.

NOTHING 'excuses' that sort of response to perceived problems. He should be prosecuted.