I think at best OP you have a raised someone who cares about people he sees as minority groups and the conversation around trans people are they are the most marginalised vulnerable group so he doesn’t have to think past that. I think it’s the nature of youth to see things in a black and white way, it’s as I got older I realised all the grey areas of life. If he also connects politics with morality or is an uncritical supporter of groups than it’s very simple for him.
At worst he can signal his virtue with no real cost to him, he will never understand what it would be like for a 13yr old to come out of the loo and bump into a 6ft bloke in a dress. Or have to talk about being raped infront of a man because he says he’s a woman. He doesn’t really understand what it is to be a girl and then a woman and how the fear of sexual assault has been the background noise to many a womans life,
It reminds me of when people have supported minority groups but completely ignored misogyny because the cognitive dissonance of seeing someone as a victim of racism but also a perpetrator of oppression is too much for them to reconcile. I’m saying that as an Asian woman.
So yes a transwoman can be a victim of violence due to toxic masculinity against GNC people and an oppressor and coloniser of womens spaces at the same time. There is a chance they can be beaten up in the mens loos for clearly being a man in female clothing but also get sexual pleasure from breaching womens privacy and boundaries (obviously some trans people are genuinely dysphoric and have a serious, persistent and painful condition, think that goes without saying).
I’m glad my parents were floating voters tbh it meant that while politics was discussed with much gusto (and quite a bit of shouting) none of us cleave too tightly to any ideology. None of my siblings or I have a party we would never vote for, I think we’ve voted for everyone except the BNP and UKIP between us. I think it teaches you to be a bit critical and think “have they got a point?” It means it’s a bit easier to shift gears, it’s not disruptive to my sense of self or “identity”.
I probably worded some of that more clumsily than I intended but I hope you get the gist. I’m not going to criticise your parenting OP, I have a kid and don’t know what the fuck I’m doing most of them time.