Sorry, Doug, but I believe you are mistaken. If atheists publically and loudly object to Christmas because they don't believe in Jesus, why don't Jews, Pagans, Hindus, Buddhists, etc., etc., do the same? Sure, this may be true for some atheists, but I really don't think it's true for even most.
But speaking of making themselves obnoxious during this season, don't ignore Christians themselves, who think they are the only ones on the planet who have a holiday during December and spout off indignantly that we shouldn't say "Happy Holidays", but must say "Merry Christmas". Right, because there are no Jews and Hanukkah, no pagans and Winter Solstice, etc., so anyone who wishes you happy holidays MUST be trying to take Christ out of Christmas.