It reminds me of an article about MDMA and fascist groups and how one leads to the other. I don't have a link, the article was terrible anyways, but the base idea, supported by scientific studies was interesting.

I don't know if a friend of yours took MDMA, but my friend told me that it is pretty much impossible to be aggressive under its influence, you can't help but love everyone. So, how can it lead to hate?

The explanation was that MDMA strengthens the bounds between people, and the closest people are within that group, the more the outside of the group is seen as a threat, a threat you have to protect your group against. Think of an aggressive mother protecting her baby.

So yes, I see how "culture fit", can lead to harmful discrimination, even when centered around positive values and topics as harmless as Star Wars and craft beer.