This is a question and i'm not trying to dunk on the tweet

I thought the main reason why those were bad because it mocked black people and they were the target of the ridicule, and while Cohen uses a similar technique in Borat he is targeting Americans as part of his satire, not Kazakhs.

I saw a criticism in vein of "People he can mock by making them think Kazakhs are actually like this would also believe that there is a country called Loftristan and its people act like that" and i can accept that, but comparison to blackface makes almost zero sense to me.