I have not seen it yet, though I have no doubt that it exists.
I believe that in real life as in the fediverse, hate speech and bigotry of all kinds needs to be very firmly shot down. Immediately downvote and block that shit. It has no place here, or anywhere.
That being said, debating or even engaging with these pricks is worse than pointless because you’ll never change their minds and will only give them a platform.