Did you mean insane, mentally ill, certifiable, deranged, demented, of unsound mind, out of one's mind, not in one's right mind, sick in the head, crazed, lunatic, non compos mentis, unhinged, disturbed, raving, psychotic, psychopathic, mad as a hatter, mad as a March hare; informal: crazy, mental, off one's nut, nuts, nutty, nutty as a fruitcake, nutso, off one's rocker, not right in the head, round/around the bend, (stark) raving mad, bats, batty, buggy, bonkers, dotty, cuckoo, cracked, loopy, loony, bananas, loco, screwy, schizoid, psycho, touched, gaga, not all there, not right upstairs, crackers, out of one's tree, meshuga, wacko, gonzo; vulgar slang: batshit; has a screw loose, has bats in the/one's belfry; lost one's reason, lost one's mind, took leave of one's senses, lost one's marbles, and cracked up?
Or just angry?
Religious belief does not constitute scientific evidence, nor does it convey scientific knowledge.
Belief gets in the way of learning--Robert A. Heinlein
How can I possibly put a new idea into your heads, if I do not first remove your delusions?--Robert A. Heinlein
It's not what we don't know that hurts, it's what we know that ain't so--Will Rogers