I get where you are coming from-- and also want to to advise caution.
Terms such as "discriminatory" and "hate speech" are poorly-defined-- with lots of room for "gray area"-- , and rules like these can be potentially abused by harassers in an attempt to censor people with whom they disagree. I hope that this doesn't open the doors for ideologues to put pressure on content and ideas that they personally don't like.
For the most part, I'll trust that the itch.io team will be able to make fair judgments and avoid that kind of scenario.