*off topic*
-to clear things up-
Christians and Muslims technically worshipped the same God. But to Muslims, they refer Jesus as a prophet, not as the Son of God or God himself. The Muslims called Jesus by the name of Isa Al-masih if I'm not wrong, and for them he's a prophet who managed to came back to live because of God.
*topic*
well, Christians holidays were already commersialized in the past few years, so it;s not a holiday just for Christians anymore, even India, China and Japan celebrates it without even knowing Jesus. I love Christmas because it's the time to spend the time with my family, lover and friends. and well... I'm not a very religous person my self though but I believe it's the birth of Jesus, and I also loved Easter and Thanksgiving. They're da shit. Eggs and Easter Bunnies rules you all.
Peace