You aren't worried about folks of other religions that don't celebrate Christmas? Only about those that do? Is this some sort of Christian privilege thing?

I've never had members of other religions get upset about me wishing them a Merry Christmas, so no I'm not worried about it. If Jewish people started whining to me about it or something then the equation might change, but in fact those that I know are usually more perfunctory about wishing me a Merry Christmas than I am to them.

As to privilege.. whatever man. The simple fact is that Christians are the predominant religion where I live and they are touchy about this matter in a way other people aren't, so why should I go against the flow? Just to spite people I feel no real animosity against? To undermine a holiday I enjoy? Literally why.