My original support group, the Boulton and Park Society started as a straight crossdressers support group only. It wasn't until I joined that they had their first openly trans member and while not everyone was onboard with that, nearly everyone else was. And it turned out the reason they were willing to support me? One of the founders came out as trans a few few years after I left.

https://www.ebar.com/story.php?ch=News&sc=Commentary&id=326804