I have never heard cis being used as a slur.
I actually have. Mind I don’t have a problem with the word in particular but I’ve read it used as a slur on the Internet and in real life.
It’s all about intention imo. Many people use it just to clearly communicate but some also use it with hatred.
A slur is any word that is used to insult someone based on their immutable characteristics (race, gender, sexuality, religion, ableness, etc.). There is NO requirement of oppression.
Extremely shallow analysis, certain words have a much different history than others and theres a lot of bad faith implications going on herea
Would you say cracker and the nword are on the same level?
That sounds sensible on first thought…but it’s easy to find slurs that are for non-oppressed people’s.
The French, for example.