Keep CHRIST in CHRISTMAS...Who's with me?
No one is stopping you from keeping Christ in your Christmas. Go right ahead, and do just that. Christ your Christmas all you want.
The problem is, you want people who don't believe in, or care about, the mythical son of your invisible, magical sky guy (who is also his own mythical son), to be required to keep Christ in their Christmas.
And to that, I give this sassy, but elegant, reply: Pffffttttt!
Celebrate the real reason for the season: axial tilt. A joyous solstice to you!