I don't consider Christmas a Christian holiday. Heck, it's a big holiday in Japan and maybe 1% of the population is Christian. :-)

Christmas has become so secularized that the word "Christmas" has lost most of it's religious significance. I think that is why there is a moderate sized segment of the Christian population that has become so militant about "keeping Christ in Christmas". They know that the cause is already lost, but they can't stop fighting the battle.

I'll take Merry Christmas, Happy Yule, Happy Holidays, even Happy Hogwatch from the Pratchett fans. :-) I draw the line at "Cower foolish mortals" though. };->