Neither of us know the background that led to any of these being added to their ick list. I provided reasons why those might be on the list.

When you are seeking a partner it's completely natural to find someone with shared interests, cleanliness expectations, and socioeconomic and religious backgrounds. That's all the list is.

And yeah, religion is a personal choice, but if that doesn't mesh with your partner there's gonna be trouble and "saving yourself for marriage" is a conservative religious take. Maybe they just wanted to have sex before marriage and the other person was incompatible, or maybe they didn't want to be in a hierarchical relationship with the expectation that they be submissive to their partners whims and recognized that their partner's "saving themselves for marriage" was an early indicator of that regressive behavior. Either way it's an incompatibility that was recognized and added to the list.