I've known a lot of Jews who have celebrated Christmas for the kids and grandkids. Its more about santa and presents, so the superficial things, not the birth of Christ.
I personally am agnostic about any religion or god, as none of us knw in absolute surety if god exists or what his/her name is. It pretty much depends on which country you were born in and in what time period as to which god you would have had faith in.