Although I celebrate the birth, death and resurrection of Christ every day this is a special day with special meaning because it was chosen.
Everything, including organized Christian religion, has roots in other practices.
So do I stop going to church because Jews went to Temple? Because many times they worshiped idols?
No, I celebrate and worship because in my heart I know my Lord knows what my intent is.
I may have spent money for presents, had a little too much Christmas cheer, but as I wake everyday
noting This is the day the Lord has made, let us rejoice and be glad in it.
So for all the Grinch's I can only pray for you and hope the joy of Jesus matches the joy you feel on this day of celebration of the birth of Jesus.
A careful reading of the events makes it clear it was not in the dead of winter that Jesus was born.