They’re conservative. The whole name is based on the principle that they want to maintain the old way rather than progress. I think it stems from fear of a changing world. The old world with the old rules provided safety, it was understandable, the rules were clear, and the rules didn’t hurt them. Now some people are “attacking” their world, their rules, everything that offers them safety and understanding. So they feel attacked.

It’s the same thing, but with another subject every time. Whether it is women getting rights, which threatens their safe world with clear gender roles. Or gay people, who threaten the simple rules like “boys love girls”, “in order to be successful, get a job, marry, and get kids”. Or non-white people getting rights. What if they vote for things that “we” don’t want? What if “they” ruin the world that “we” got so used to.

Trans and especially non-binary people are just the next group in like that threatens their simple world. When men are people born as men and women are people born as women, it’s way easier to force people into the traditional roles. The old rules still work, “boy marries girl, gets kids”. And when they speak out about their "concerns* they are (rightfully) called out for it. So they become defensive and start doing whatever they’re doing now.