And most Jews are not real happy about Christmas either..
On the other hand some Jews ARE christians...
This reply may sound like a bad joke, but it's no joke at all. I have several Jewish friends back in my old home town who love Christmas. In the words of one of them, "That's the time of year where we all hold hands 'round the cash register and sing, 'What a Friend We Have in Jesus.'" (His words, not mine!)
Has that really been your experience? I think maybe you are making an assumption that just isn't the case. Most Jews I know either love Christmas, or are neutral about it. In fact, I never met a Jew who had a gripe about Christmas. When I worked at a local hospital, Jews were always happy to work on Christmas so that the Christians could have the day off.