Prejudice toots that "fish" for replies so as to accuse people of prejudice.
Um, sure? :) I mean, I think EVERYONE (including me) on social media (and everywhere else) has some form of prejudice and some form of ignorance. We're all only human.
But that doesn't mean that members of an oppressed group wanting to be able to talk about their particular issues without having others comment, and politely requesting that people obey that wish, is "racism" in the same way it would be for other groups.
Asking a group to please not come into a discussion, is not necessarily judging all (or any) specific members of that group.