Merry Christmas!

Dear Blog readers,
Today there was a facebook post from Atheists of America who want to 'keep the merry, and dump the myth'.  If someone doesn't want to celebrate Christmas because they don't believe the Son of God loved them enough to come here and live and die and rise again so they could be reunited with God, (theme of Christmas), and they don't want to celebrate the pagan mid-winter holiday (date of Christmas -Jesus being born when it was warm enough to sleep outside), then why are they participating in this? Why not stand down, as the Jehovah's Witnesses choose to do?