One cannot be friends with these insane, ignorant, irrational, dangerous people any more than one can be friends with a bucket of rabies-infested bricks.
You were way too patient. I have told my ex-friends, and my mother, to sod off after the first surreal conversation with them. I will be happy to talk to them again when they decide to come back to the world of reality and rationality. Unitl then, the world is a large place and life is too short to spend it arguing against utter nonsense with toxic idiots.