You were banned immediately while the mods would have sorted out what was going on with you. My entire contribution to that thread was to edit one post after yours and, at this point, there's no way to tell how long after the immediate event my edit occurred. I wasn't a participant on that thread and I wasn't the one who put in the ban for you. And given where I was in my personal life at that point, I probably wasn't involved enough to ensure that you got a PM or that the ban thread was updated properly. But I've already said that we erred there. I was probably involved in some discussion about your ban, although what my contribution might have been has been lost to time.
But given that the 3 posts after yours were...
Zooview: "Really? You want to write that? Really?"
WaynetheDrain: "He's going out in a blaze of stupidity."
sunnyheel: "Transphobia - it's what's happening"
...I'm guessing whatever you said was clearly transphobic (especially since your two previous posts supporting Chappelle on that thread were left untouched, so it wasn't merely your views but whatever specific thing you said that got you a ban) and you were moderated for it.
So, in the case that you apparently went full transphobic and said something clearly over the line, I have no issue with the fact you were banned with no warnings and no appeal. While I don't know exactly what you said, judging from the thread the ban was fairly clearly valid. I do hate you didn't get a PM and your ban didn't get added to the ban thread and the lack of those are duly noted. Of course, had you not immediately followed your ban by PM'ing me insulting me and later followed up with threats, you might have been able to get a reasoned response and explanation.
So, we'll note that in your case you didn't receive the customary PM and ban thread note. And that you were almost certainly justifiably banned for being transphobic.
I hope you're able to overcome this terrible saga to go on to live a normal life.