[asformeandformyhouse]

I agree that all christians should celebrate Christmas

I don't. Many christians don't celebrate Christmas and some who do don't celebrate it as the birth of Christ.

Romans 14:5  One man esteemeth one day above another: another esteemeth every day alike. Let every man be fully persuaded in his own mind.
6  He that regardeth the day, regardeth it unto the Lord; and he that regardeth not the day, to the Lord he doth not regard it. He that eateth, eateth to the Lord, for he giveth God thanks; and he that eateth not, to the Lord he eateth not, and giveth God thanks.

[MineralMan]

"I don't. Many christians don't celebrate Christmas and some who do don't celebrate it as the birth of Christ. "

Indeed, you are correct. In the first place, it's extremely unlikely that Jesus was born at this time of year. We don't know, actually, what time of year he was born.

Christmas was placed at this time of year to substitute for various pagan celebrations which occurred around the time of the Winter solstice.

Lots of folks celebrate non-Christian holidays during December. Happy Holidays pretty much covers it, no matter who you say it to. Even atheists celebrate the beginning of the New Year, so it applies to the non-religious as well.

As for yourself, well, you're more than welcome to wish me joy for whatever holiday you celebrate. I'll thank you for your wishes.