I think that for a lot of people these days, it isn't really about religion. I think that people should just celebrate it the way they want, so if someone wants to "keep Christ in 'Christ'mas" then they are free to that, but Christmas has changed so much over the years. I know for me, Christmas is more about being with my family and friends, but I am an Atheist so that's kind of why I guess. But anyways, just do what you want on Christmas, there's no use in being upset over how other people celebrate.