You all are overthinking it way too much.

Most people hate anything that’s different or uncommon to themselves and their “world”.

Simple as that.

It’s heterophobia in the semantic sense of the word “fear of anything that’s different”.

Far simpler than whateveryone else is saying. The best way to rally humans to your side is to give them a common enemy. So conservative politicians picked enemies that are small in number and told everyone how they are to blame for all that is wrong in the world.

What?

Fascists are cowards who attack the most vulnerable people as a standard tactic.

For a simple example: my mother is Catholic and until Trump came along, a lifelong single-issue Republican voter who always said she would be a Democrat if it weren’t for abortion. She attends church in an extremely progressive, famously LGBTQ-friendly town.

There’s a transwoman who attends her church (let’s call her Rita). This lady is probably in her mid-50s to mid-60s and has been a fixture at the church for at least 5 years. My mom has been in choir and bible study groups with her for years now. She still just can’t see Rita as a woman. Treats her politely but behind her back refuses to call her “she” and says she’s a “man in a dress”.

She’s really offended that Rita uses the ladies’ room. I’ve asked her why and she can’t articulate it, she just feels like it’s an invasion of her privacy, because men don’t belong in the ladies’ room. And when I point out that Rita isn’t a man, she just rolls her eyes. I’ve asked her if she’s worried that Rita is in there for predatory purposes and she admits that she doesn’t think Rita intends any harm. I’ve asked her how she’d feel if she were forced to use the men’s room and she says “but that’s different!”

My mom prides herself in being a moral person, and still can’t manage to get past her bigotry to see Rita as a woman. There are just too many mental blockades against it. But since she thinks she’s so highly moral, she thinks she must be correct in this situation. It excuses her from finding empathy and bettering her attitude toward trans folks.

My longwinded point is that when people who consider themselves highly moral are bigoted, there’s almost zero chance of getting through to them. And I think a lot of the people who are bigoted against trans folks feel that morality is on their side and being trans is morally deviant, so they think they’re justified in their prejudice.

Conservatives use fear to manipulate their constituents as their primary means to rally support. A minority scapegoat many of their supporters don’t know in person, like trans people, are easily demonized by politicians and clergy to pretend trans folks are pedophiles and sex assaulters projecting their own party and priest crimes, it’s the same thing they try to do with fear mongering homosexuals as a previous scapegoat to distract and deflect from their awful policy privileging the wealth class and harming poor and middle class people, they need someone to blame for their own awful behavior and choices.

It seems like it’s always projection with these fascists.

They are the ones whose “party” is full of violent sexual predators. They will never bring up the monsters (including their “president”) on their own “team”.

At this point I’m assuming that loads of them either want to be trans, want to have sex with a trans person, but they feel they can’t do either because they were told it’s evil

It’s the same as the gay hating, any guy very visibly hating gays always ends up snorting cocaine from a gay escort dick.

It’s a failure of empathy. People hate and/or fear what they don’t understand.

They can’t empathize with someone not feeling right in their own skin like that, so all their rationalizations for things like “why would they want to use that bathroom” end up stemming from what they have left, which is unsavory intent, making them threatening.

I’m going to be an apologist for conservatives for a sec, just for the sake of giving out my theory of mind of these people.

I think this all happens mostly due to the stress trans people are inadvertently causing their parents. When your kid comes out of the closet, this will happen to a parent regardless of how liberal-minded they are. Even if you have no problem with the concept, your kid being trans brings about new kinds of threat scenarios you never had to think about before. If you’re a sensible, smart and handsome person like I truly fucking am, you can process it in a few years and come out as not being a 100% asshole towards the issue.

But if your reference group is republican church goers, there’s a high probability that such a person just simply does not have the mental or social toolset to process it in any sensible way. They will construct a toxic viewpoint for this issue, strengthen it from outside sources and then start to spread that toxicity.

I’m a southerner. Take what I’m about to tell you as close to the grain of the problem as possible, because it is.

Here’s the thing. 9 times out of 10, a Southern man is going to meet a lone trans or gay person, have a pleasant experience talking to them and go about their day, they even make friends with the person, spend years talking to them, send gifts, become family members, etc.

But you know what?

Behind closed doors, it’s “fuck those trannies”, “not in my schools”, etc. My mom does it, her sister does it, my dad did it. It’s hypocrisy at an extreme level while also ignoring it at an extreme level.

“Well I have gay friends… I’m not homowhatzit”

THEY’RE TEACHING WHAT!?

“Double Standard” might as well be the tagline for the entire South. They’ll protect their religion and the expectations put on them by their parents and social norms on a general level across the board, while still shaking hands and eating cake with their lgbtq+ buddies.

Just remember any southerner is one thought from God away from stabbing you in the back at all times, because no matter how close you get to them, even as a family member, that book and the expectations behind it means more, was beat into them more, every day since they were born until you met them.

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 line 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.

Because of tropes like https://tvtropes.org/pmwiki/pmwiki.php/Main/CreepyCrossdresser from movies like Silence of the Lambs, Dressed to Kill, and Psycho. It puts the idea of men dressing like women as a means of tricking women to attack them into the collective unconscious.

Because Trump spent $19 million on transphobic ads during football games in battleground states. Because they need a Boogeyman to rile up their base.

It doesn’t have to make sense. You might as well be asking how can the KKK hate people of color or how can Nazis hate Jewish people.

Hating gays isn’t cool anymore and will get backlash even from conservatives.

Trans people are the new gays in this sense

Fear, control, indoctrination, tribalism, double standards, poor mortal character, hypocrisy, and because it ‘makes them feel icky’ and so they have to be loud and obvious about it so that they’re community sides with them and doesn’t suspect that they’re (allegedly) total closet cases.