"Insanity" is the right term, I think. Bigoted hatred is a mental illness. It is unreasoning and unfounded. It's pure delusion. I've said it for a long time.

"Hate is insatiably ravenous and will devour us all. It is the root of fear and bigotry and extremism and violence. Hate is a contagious mental illness and needs substantive and qualified psychiatric treatment – for all our sakes." ~MomzillaNC