Frankly, those that "have fun" by punching down the already-downtrodden deserve everything they get, especially when one side is a lone politically powerless nerd. Suggesting an equivalence between the entire political right, with its glorious machinery designed to disenfranchise, and some guy who writes simple RPGs, is a false equivalence at best. Remember that politics is the study of who gets what, where, when, why, and how they get it -- this lone nerd isn't even preventing anyone from anything, he's just spewing helpless vitriol. The grand array of the political right is actually actively taking, right now.

"If you stand by quietly as Republicans take the power of the vote from African Americans in Alabama and compete to hurt trans people as badly as possible then you are part of this problem. You are lobbying for the death of my friends and relations, you are pushing for dangerous authoritarians to destroy the systems that let books like mine come to be. And this goes for equivalent groups outside the US–you know who you are."

Ie, don't be a fascist.

Perhaps those who wish to remove rights from people and treat them as second class citizens simply because of their sexual orientation, religious belief or lack of belief, or socioeconomic status deserve to be treated the way that want others to be treated.

I see little wrong with letting people experience a bit of what they, if they could, would force others to experience.

I don't see how saying, "have fun how you'd like to" and "dont buy my thing if you have different fundamental beliefs than I do" are the same. Feels like you're stretching a bit to try to make a point.