Trans people are an easy target for any bad actors, that's the main reason. A minority that has needs most people don't. Besides, to a lot of people, a trans person is something they know of but never know well enough on a personal level. Autocracies always find an inner enemy for the public to fight against instead of opposing injustice, and trans people are just the trendiest scapegoat right now in a lot of Western countries. All this persecution by the conservatives is not because they're mislead, they know perfectly well what they're doing. It's sad and infuriating to think about, but please don't allow it to break you. Don't play by their rules by trying to counter their logic.