To some extent it's inevitable that people who don't share your culture, uh, won't share your culture. It's true that it would be nice if they were more knowledgeable. Certainly I think it's silly for them to try to act like they care about it when they demonstrably don't care enough to learn anything about it. But I would never suggest anyone has any sort of moral obligation to seek out that sort of knowledge (nor, I assume, would you).

....when I started this post I thought I had some sort of point to make, but I'm no longer sure what that might be. I guess it's something like: I agree that people are ignorant, but I don't think that this particular sort of ignorance is any more than an annoyance.