Hi, I'd like to try clarify a few things here.
First, men in drag are not women. Men are still men regardless of how they dress. Trans women, however, are distinguished from men by the fact that they experience their lives as women.
Second, we're not discriminating and pushing a harmful agenda, you are.
Third, the reason why disagreement is not accepted is because trans people are tired of having to fight so hard just to be seen as themselves. The acceptance we're looking for is acceptance of self, while the acceptance you are looking for is acceptance of disbelief that it's possible for someone to exist a certain way. Gender, unlike someone's beliefs, cannot really be changed. At the same time, I understand that it's not always easy to change what you believe, especially if you have reason (or supposed reason) to believe it; however, that does not make it true or right.
Fourth, the trans community has always been an important part of the queer community, helping to fight for rights and even build a community in the first place. As for "the rest of the alphabet": though some identities have not been named or recognized for long, they exist for a reason, that reason being that someone identifies with them and wants to see if anyone else does, too. I myself am asexual and aromantic, and could use more specific labels if I wanted to and thought they fit. I do not identify this way because it's a trend, or because I want to be part of a club, or even because I think people will treat me differently because of it; I identify this way simply because it matches my experience of never having been sexually or romantically attracted to anyone. I don't expect special treatment, it's mostly just a form of self-discovery (for me).