@Witchsmeller Cis is the logical opposite of trans, it's not just a question if identifying. You don't identify to being trans, you can move the threshold but you either are or are not. You're either trans or cis, it is factually a binary characteristic, by its definition.
It's borderline bigot because of the usual transphobic argument to abolish "cis" as it should be defined as "normal" and "trans" as the single exception that requires a label.