As a non-Christian with a deep affection for Christmastime, I've always felt a little left out around this time of year, but not in the way you might think. I've always felt a bit out of place with the venerable conservative tradition of denouncing the "war on Christmas." I should offer some background. When I was a kid, my parents cut out a jokey headline from a local newspaper that read "Santa Knows We're Jewish" and put it on a cardboard Christmas tree ornament. My father insisted I be raised Jewish. (I went to a Jewish day school and was...