It's kind of bad, isn't it? How one celebration is okay but another isn't. Personally I'm a little bored of Christmas. I would much rather have a holiday that's tied to another culture because the holidays are generally about family and friends and all those good things. Though in the end I want a simple winter celebration. No specific holidays, no icons, just something like celebrating the winter solstice. It would settle this holiday debate and fits in with Destiny lore 100% better than any holiday people celebrate now.