We had an Indian family move in a few doors away a couple of month back. We thought maybe we'd send them a Divali Card. Then we found out they were Catholics, so we didn't. Divali came around, and it turned out they celebrate it anyway, alongside Christian feasts.

That's how it's supposed to be. Nobody thinks that celebrating Saint Patrick's Day is an insult to people who aren't Irish, do they, or that only Irish people should be allowed to celebrate it?