I have known legalistic Christians like this and they are miserably, unhappy people. No fruit of the spirit there.
So, Grisham, please, please, please point out in the Bible where our December 25th holiday is a celebration of the birth of Jesus. Go ahead and search your Bible, I will wait.
While you are doing a study of "God's word," I would suggest you take a few minutes and review what Scriptures say about hurting the young hearts of children. You might also want to refer to the clear instructions about helping those who are poor and suffering. 
Next time you go to a mall, how about setting up a foot washing station for those tired people and get on your knees and provide some humble, caring service. Slap a piece of duct tape across your mouth and wash their tired feet and listen to their hearts. You might find that in this process you make the transition from a Pharisee to a follower of Jesus.