Have you noticed this time of year the people who get all pissed off when someone says, "happy holidays?" They launch into a rant about how it's Christmas and there's some ploy to assert political correctness over everyone or some such nonsense. And nothing says celebrating the birth of Jesus Christ like being an angry jerk!
You know, the more simple explanation is that the period from Thanksgiving to the New Year, with Christmas in the middle, are in fact, collectively known as "the holidays." I understood that when I was 5 years old in 1978, before the term "politically correct" was even born. Why do people interpret this as some kind of assault on Christianity?
Perhaps my view is skewed, too, because I could even buy the political correctness angle. The world looks fairly diverse from where I sit. I have close, personal friends who are Jews and Hindus, and it would be kinda silly to wish them a "merry Christmas" if it's not a holiday they observe. I don't think Christmas observers have a lock on good cheer, peace on earth and what not.
I just happen to believe that spending a lot of time being angry over something that has nothing to do with what you believe is a complete waste of time. Get over it. Do something for charity, decorate your tree and go on living your life. And happy holidays!