The word for this is fundamentalism. When people believe it’s their way or the highway and all others must conform.
However, in the case of trans folk, I think it’s a bit different. They’re not forcing pronouns on others, just asking that they be shown basic human respect. If you were a straight man, I’m sure you’d get pretty annoyed if someone insisted on calling you a woman nonstop. Sometimes, people need to be louder when they’re facing an existential crisis as they are in the USA among other places.
And patreon/liberapay for creators and journalists I enjoy.