One tedious "debate" that is re-hashed every year is "Happy Holidays vs. Merry Christmas". For some bizarre reason, there is a segment of society that takes offence to the greeting "Happy Holidays" while simultaneously accusing other people of being offended by the greeting "Merry Christmas".
This dispute makes no sense to me whatsoever. I have never encountered anyone take offence from being wished a pleasant Christmastime. "Merry Christmas" is just a greeting and a wish for the receiver to have a good time during the Christmas season; nobody takes offence from it - they say "thank you" and reciprocate the phrase; however, there are people who seem to think that Christmas is "under attack" and that "Happy Holidays" is the main weapon of a war against it.
If someone gives me any of the above greetings or another, my response is to thank them and give it to them in return. That's all that needs to be done; the outrage over "Happy Holidays" is ridiculous and immature.