Does it ruin everything for you?
I started mass chaos when I corrected my German teacher about the origins of the Christmas tree; it's not a big deal. Who cares if Christians copied some old tradition. It's the thought that counts
Also, I read a biblical text condemning the Christmas tree (I'm an atheist) and now my mother is horrified. People need to relax~
In conclusion, who cares if some dude had sex with his mother and lied about it. It's all 'bout the spirit. I love me some Christmas