If you can't turn your mind off of religion at Christmas and just enjoy it for the fun celebration that it can be, then I suspect you are more religious than you think.
For me it isn't about religion, it's just about the "Santa" and "fun and fantasy" side of Christmas.
Religion aside, Christmas is a time for children to enter a fantasy world, and a time for adults to relish in providing that environment and escape from the everyday reality we must endure.
If you can't enjoy Christmas, for ANY reason, then I pity you. Christmas is wonderful, it's just the people and the crap presents that make it problematic