I say the holiday greeting that goes inline with my beliefs, so I say Merry Christmas...
if a Jewish person wished me a happy Hanukkah, I'd warmly wish him one back... I dunno why people get offended like, if they don't celebrate Christmas and they see a store window with a Nativity scene in it... Come on, it's not your store window, obviously the person who owns the store celebrates Christmas.. Anyone should be able to practice what they want, as long as they don't mess with someone else's right to theirs..
In other words, I'm glad that you guys aren't afraid to say MERRY CHRISTMAS lol.. (It's a lot better than "Happy Holidays" or "Season's Greetings"
)