True
I wish others Merry Christmas some wish me Happy Hanukkah, etc.
It makes sense for you as a jew to wish me a merry Christmas if you truly mean it, but it makes no sense to me to wish you a Merry Christmas if you are a jew. Happy Hanukkah would be more appropriate for me to say to you.
Not always knowing the other person's persuasion or anything about their holiday, I stick to my own holiday and hope they take it the right way.