I don't mind if people want to indicate connection by a shared vocabulary. But I am not sure sometimes that everyone understands: America is not a Christian nation. This is true despite the fact that since our founding there have always been the religious that are not content with being religious, as Jesus suggested, praying in secret, but have to pray openly. Now it's on the Facebook highway. Their crusade is long-standing enough that Wikipedia notes ---
I know, if it bothers me I could be more selective in my "friending." Too late now, and also, you never know, do you? And yes, I know I can "hide" people who get to being annoying. And I do. Then at some point I think of them and bring them back out of hiding. In this case, that will probably be after the holidays.
Don't think I don't have problems with the secularization of Christmas. I love the centering on the miracle of birth amidst poverty, the idea of the divine in our midst. I end up in tears singing "Silent Night" in the candlelight service. I was fit to be tied one year when the reins got loose at my church, and the Christmas Eve service featured "Jingle Bells" and the Christmas choir concert featured "How the Grinch Stole Christmas." I don't go to church for this, and I don't think the children particularly benefit from it - they can see this on TV and at the mall.
read Wikipedia - the very date of Christmas is thought to have origins in pagan winter festivals. Look at it that way, you could say that the Christians degraded the pagan impulse. Yet I don't see my pagan friends agitating to boycott everyone who sells artificial Christmas trees and yule logs.
And if you really think those of us who wish our Buddhist, Muslim, Unitarian, Jewish, etc. friends "Happy Holidays" are involved in a war against Christmas, I invite you to look at history and the wars against religions. Take the current Chinese oppression of the Falun Gong - go ahead, read about it. And think about what freedom of religion really means, and let the rest of us have it. Then put some cookies out for Santa. Or a Coke, for all I care.