I promise I'm not making up the trans support among left wing, mainstream Christians. And yes, obviously, I'm having conversations with leftie Christians who have misgivings, but they always want to stay private about it, and I know at least four or five influential progressive Christians personally who are absolutely fired up vocally about this, and I follow LGBTQ+ groups full of UK Christians of the same mindset. As mentioned,the intentions are well meant, and the hook up with LGB rights means people are petrified to do anything except completely, unequivocally support trans everything, lest they be seen as just like all those nasty traditional conservatives.
I've had conversations with Christian TMs where they have been having a go at Gay men for not being willing to consider relationships with them just because they are not physically male, trying to explain how jaw dropping homophobic this is, to no avail. I've tried to explain, in conversations about banning conversion therapy, that telling a woman whose husband has transitioned that she should stay and just be fine with being a 'lesbian' is exactly the same coercive, manipulative abuse, to no avail. In my experience, leftie Christians are possibly the most hardened of all the members of the broader cult mindset.