I’m not the OC, but I definitely have a strong Christian bias when I hear that someone’s a creationist. I would almost certainly assume they were a baptist or Pentecostal if it wasn’t specified. It doesn’t matter, but it removes the potential excuse that it’s just the culture he grew up in.

Though now I have to look up Jewish creationism to see if I was very wrong.

Edit: it’s kind of what I suspected- there are Jewish creationists, but it’s not nearly as common, and there are a lot more options for reconciling two seemingly incompatible beliefs within the framework of Judaism.