Oddly enough I have had people from many different religions wish me a Merry Christmas and do not ever recall any of them saying Happy Holiday's to me. For one thing I do not think many of them see Christmas as offensive as some of us seem to think they do, because it does not conflict with similar celebrations of other beliefs because the various celebrations do not actually fall on the same date. Ironically the ones I do get Happy Holiday from are usually either silly political correct people or non religious people of our own culture. One person at work prefers to wish everyone A happy Ho Ho which I personally find some what irritating, It's Christmas. Remember when Merry Xmas was popular. I did not care for that either.
I respect other peoples beliefs and cultures, as long as they are non violent and only wish for the same respect in return.