Already exists. There's plenty of games based on pro-racism or pro-sexism. There are even games that let you play out
rape fantasies if that is so your desire. You know how well these games did out on the open marketplace?
They didn't.
They
tanked, got public scorn and disgust, and were generally regarded as complete filth. Those that were curious about these things often heard about them first from either a news media outlet decrying them, a YouTuber talking about how heinous they are, et cetera. Hell I heard about both of them from friends talking about some of the worst games they could think of.
In the open marketplace of ideas, the good ones flourish, the poor ones die. People can judge for themselves what is right and wrong, and the mountains of people who play murder simulators versus the number of people who actually go out and murder people speaks
volumes in this regard.