a person who is obstinately or unreasonably attached to a belief, opinion, or faction,
Hm.
Women who are obstinately or unreasonably attached to a belief in objective reality and sex as a fixed fact because that's how their biology affects them day to day? A belief that was held by the entire world until about five minutes ago, and is only seen as unreasonable because it says no to the absolute freedoms of less than 1% of the male population at the expense of said women? Unreasonable?
Gender activitists who are obstinately or unreasonably attached to a belief that reality is created by feelings and not facts, that people can change sex, that sex is a spectrum, that some people are born in the wrong body with gendered souls (that came from somewhere and presumably were put in the wrong body by some greater force that is a bit of a klutz and will go somewhere else after death??) and that female people should not resist or protest this because it impedes males? Unreasonable?
especially one who is prejudiced against or antagonistic towards a person or people on the basis of their membership of a particular group.
Women: be trans, that's great, just respect women needing female only spaces too and permit facilities, resources and language that equally respects and includes our reality, needs, cultures, faiths, disabilities, homosexuality, so that society remains equally accessible and we can live alongside each other in peace.
Gender activitists: Terf, cis scum, death threats, bigot, corrective rape, only total capitulation and abandonment of female needs etc will ever do...
Let's compare and contrast, shall we? 😀