X now considers the term “cisgender” a slur. On Tuesday, the platform reportedly began posting an official warning that the LGBTQ-inclusive terms could result in a ban from the platform.
Devils Advocate. Possibly can be considered a slur as by all definitions is a term coined to 'label' non-transgender. So it could just be as simple as not owning the word for some people that makes it feel insulting.
That's the only reason I could think of without it being blind hatred.