I think the biggest source of disagreement between the LGBT and asexuals has its roots in this: The former have traditionally been considered perverts, and the latter have not.
That really colors you, growing up as LGBT, and I think it’s something that we can all come together on. That sense of being wrong, warped, disgusting, outcasts. It’s something that comes back to you, that you can never quite shake. Even if you were fortunate enough to have a loving family environment that fully accepted you, society at large would be more than happy to let you know.
Oppression as an asexual is different. It’s not one of inherent wrongness, so much as not living up to expectations. Your mom may be disappointed she’s not getting grandkids, but she won’t throw you out on the street.
Asexuals don’t seem to realize this, I guess. I see you talking, laughing and crying and complaining about heterosexuals/sexuals altogether, and it always comes down to this: Wow. What perverts.
We feel it. We cringe. We try to tell you, but you just tell us, hey, we’re all oppressed here!
I’ve seen, on so many occasions, LGBT trying to fit something to them, to make them feel better about themselves. “These characters are gay/bi, like me.” “This character is trans/nonbinary, like me.” “I can tell because they act like me.”
And you swoop in: “Don’t make this a sex thing! Not everything is a sex thing! They’re just asexual, and don’t care about that sort of thing!
You pervert.”