That’s because many of them are old enough to remember a time when you were supposed to be quiet about your racism because you knew the rest of society would shame you for it.
Unfortunately, America has never reached the point where a majority of people felt shame about their transphobia, so in their minds it’s okay to be more open about that.
But for every one of them, how many of their peers are still in it? I’m the only one from my generation who got out of my terrible religious upbringing.