Sad to say, a lot of gay and/or lesbian oriented communities have always been some mix of racist, transphobic, and/or biphobic, and occasionally even classist as well. Being an oppressed minority doesn’t prevent one from being a bigot.
This has been gradually changing. More transwomen are finding a place in lesbian spaces. More transmen are finding a place in gay spaces instead of lesbian ones. More nonwhites are finding places in either, and are no longer willing to put up with racists running the show. Bisexuals with lesbian or gay partners don’t want to have to pretend to a label which isn’t truly theirs to be accepted in their partner’s community.
As a result, the more bigoted members of such communities find their power waning, their friend circles shrinking, their legitimacy challenged. More inclusive communities are slowly growing and replacing them. They find themselves being in the very unenviable position of being looked down upon by nearly everyone, both other bigots who don’t share their particular minority status and most non-bigots.
The “obvious” solution is to divide, disrupt, and carve out slices of the larger LGBTQIA+ community where they can be queens and kings again. The non-obvious (to them) problem is that this is happening because most people have other, better options now, and aren’t going to stand for that.