If people got out from behind their keyboards and their little echo chamber and met members of the wider LGBT community they'd find minimal support for the LGB Alliance.
That's an interesting claim and on the surface not necessarily untrue. However, as I left the LGB Alliance launch last night, I went to a coffe shop before setting off coz I was so tired I decided I needed a coffee to be alert for my drive home.
And got chatting to the young chap who served me. He asked me what the LGB Alliance was and got it straight away. You'll probably find that most people are much more likely to understand that the LGB group has a number of different aims from the T group, and that it is normal to have different organisations advocating for those aims.
Of course, within the LGBT community, if you spin this as hateful and a betrayal of the T, people who don't look beyond the surface, may well agree with you at first. But if you sit them down and explain the aims of the group, most come to a different conclusion.
And it's hardly surprising that a group which was founded a mere three months ago has not yet found wide acceptance. I'm confident that it will be accepted to sit alongside all the different trans organisations which exist solely to advocate for those who identify as trans precisely because some of their aims are specific to the needs only those who identify as trans have. There's no justification at all otherwise to accept the existence of all of those purely trans orgs while rejecting a purely LGB org.