also the fact that the "disabled slaver" thing is a meme like I said before.
Oh, I didn't realize this. Still, I don't see how bringing it up in this context (the tweet is definitely about the BAFTA awards, based on their timeline) can not be ableist, unless it was responding to some specific racist point someone else made and there's no indication of that that I can see.
My interpretation is that it's a sarcastic attempt to liken the two following ideas.
A person with Tourette's isn't saying slurs because they're racist (which is correct).
A person can't be held accountable for owning slaves because they needed help due to a disability (this is absurd).
The implication that those are at all similar seems very ableist to me. Of course, it's possible I've misinterpreted it, which is the problem with this kind of "hot take" Twitter bait method of communication.
Also, does BRG use they/them? I wasn't aware. If so I should edit my other comment.
Possibly true, but that doesn't make it any less ableist (not that you're saying it does). I anything, it makes it more ableist. If it's just bait then the goal is purely to offend disabled people.