Junction Guy - it depends on what type of Jew they are. There is Reform, Conservative and Orth.... Depending on their strength in their belief, they may or MAY NOT celebrate x-mas. However, there were several kids (in particular I can think of one boy by the name of Neal) that would not even come close to a Christmas tree. The school had wanted us to all make something for the tree and decorate it. I remember "taking a stand" along w/ several of the other kids there were a total of 5 of us from our class, I was the only JW. Neal was a die hard Jew and would never participate in any christian activities as he found them offensive to his heritage and beliefs.
I cannot testify as to all Jews or Muslims, but I can tell you as to the ones that I associated with and am still in contact with today. There are some that do participate in x-mas, but for the vast majority of the people that I know and socialize with that are Jewish, they do not participate in Christmas because it is not their holiday and yes they have their own observation of the Hanukkah. But if you were to say to a Jewish person that it is like Christmas, be prepared to get your head chewed off because they find it offensive.
I don't know enough about the Muslim faith to know what they celebrate around December.