parent explicitly mentions people making racial jokes and mentioning racial stereotypes. This occurs even in every large subreddit, well-behaved or not. They likely aren't even malicious on the part of the people who say them, but nevertheless, they are damaging comments to make, and I wouldn't blame people for leaving reddit because of them.

that said there are plenty of small communities that are pleasant, sure. But some people would rather go elsewhere than take the time and effort to curate their subs, and that's perfectly reasonable.