After consultation with the other mods:
First, that post was off-topic, since it was about the characters, not the performers. Neither you nor we know the performers’ sexuality, since people of any sexuality can portray people of any sexuality.
Second, if what you wanted to say was that you saw a performance where all of the characters were portrayed as gay, you could have found much less problematic ways to say it. As it stands, it’s just a gratuitous shot against the gay community.
Third, while gay and trans are not the same thing, and so this doesn’t fall afoul of your topic ban, it does still appear to be a part of the same pattern.
Fourth, just a few days ago, you were already moderated (though not officially Warned) for a similar cheap shot against the Hispanic community.
Given all of that, this is going to be an official Warning.