You know, after having posted this, I realize that some people might feel it was sacreligious, and if that's the case, I apologize.
FWIW, even though I'm Jewish, I always wish everyone a "Merry Christmas" (unless I know they're Jewish, then it's Chanuka).
Mark
I always say "Merry Christmas" unless I know the person is Jewish. More than 95% of Americans celebrate Christmas, so all this tiptoeing around is a bit silly. That said, I think stores and TV stations say "Happy Holidays" as a shortcut for Merry Christmas, Happy Chanukkah, and Happy New Year. They don't mean it to be offensive -- especially when it's written in red and green.