I don't, but I see you've met my mother
I think people are most critical when (they think) another person's beliefs conflict with their own basic sense of right and wrong.
I do that only to people, who insist on forcing their lifestyle upon myself. Don't try to force me into your own mold. I will not fit in it.
Maybe to make themselves feel better or hide things about them. I wish I knew, I was having a problem with that a few minutes ago, someone messaged me criticizing me about what I like. I didn't even know them.