December is filled with different religions' holidays.
What's so horrible about stores saying "Happy Holidays"? How does it offend you? Isn't Christmas a holiday?
If you really want to affirm the meaning of Christmas, feel free to drop by your local church on Christmas, and make sure you put a donation in the collection basket, if one is passed around.
Bill O'Reilly won't be happy until kosher delis are wishing people "Merry Christmas".