Even calling it a slur may be an anthropomorphism ;-) To me it is more serious, it shows a distinct lack of understanding (or, if I’m being uncharitable, intent

Even calling it a slur may be an anthropomorphism ;-) To me it is more serious, it shows a distinct lack of understanding (or, if I’m being uncharitable, intentional honesty) and hence immediately makes me doubt anything else that person has said.