It's probably one of their lot larping "as a leftist". Same shit the fascists have done with "as a black man" forever. They used to do it with feminist stuff too, make completely psychotic accounts that they larped as and then used that as a content mine for the misogyny subreddits like trp pussypass etc etc.
Idk ive seen plenty if anarchist accounts argue that consensual cannibalism and incest shouldnt be illegal. The other day i saw a "thats gross, but not necissarily against my ideology' post go around and people pretty much all said those two things or kink stuff.
This is a pretty extreme example of that i guess but not out of charachter.