I asked ChatGPT for its wisdom. This is pretty much what I thought.
Having differing opinions is fine, but you can't just declare a non-offensive word or prefix to suddenly be offensive because its dictionary definition refers to something you disagree with or dislike.
"In the context of gender critical ideology, the term "cis" is not inherently offensive. "Cis" is used as a counterpart to "trans" and simply refers to individuals whose gender identity aligns with the sex they were assigned at birth. However, some gender criticals may take offense to the term because they reject the notion that gender identity can differ from assigned sex.
Gender criticals often view the use of the term "cis" as an attempt to legitimize transgender identities and experiences, which goes against their belief system. They may perceive it as a form of language that challenges their perspective on gender and undermines their ideology.
It's worth noting that the term "cis" is widely used in academic, medical, and LGBTQ+ communities as a neutral descriptor to distinguish between individuals who are cisgender and those who are transgender. Its purpose is to provide a linguistic framework that acknowledges and respects diverse gender identities."