Celebrating Christ's birth honors him in how we do so. So long as we treat it as a time for charity, generosity, forgiveness, and joy - it is a credit to His life and mission.
Merry Christmas!
When I hear this argument I often think of 2 Corinthians 11:14, [And no wonder, for Satan himself masquerades as an angel of light.]
If your going to celebrate Christmas.....just be sure you know what it is you are actually celebrating. You will not find it in the word of God.