I try to make this as exeggerated and stupid of an example as possible if I got it right:
So… let’s say if a 37 year old man, born male, with a wife, born female, who is married with kids with a house in suburbia and stable income, calls some regular thai ladyboy a “fag”, while said ladyboy counters “pretty harsh tone for a cis” and then that 37 year old man gets angry over the fact that he’s being called “cis”… That man is being angry about the fact that he is being called non-trans?