Many magas don't agree with all of trump's talking points (ask any of them how do they like tariffs and you'll see) but they are brought together by hatred towards "the other". It's hate that fuels them so there's no point expecting them to understand basic concepts such as lgbt+ rights being human rights.

I too am neurodivergent (autistic to be accurate) and I have hidden it from my parents because I got diagnosed at middle age since they didn't want to hear about it because they wanted a "normal" kid. I tried to talk to my father about this and. radicalized as he is towards fascism, he just dismisses it every time saying that autistic people are (his words, not mine) "subnormal" and "retarded". 20 years ago, although right leaning, he was reasonable, now, thanks to facebook and the likes, he's a rightwing drone that only thinks what media tells him to. I now only talk to him once every few months, I have made my mind around the fact that he is a lost cause.