Here's what people don't get... Christmas, in this day and age, is essentially a secular holiday. Some religious people may assign religious meaning to it, but for the rest of us it's a few days off at the end of the year to reflect and wish our fellow citizens well. I'm an atheist, and I put up a tree, decorate my house, exchange gifts, etc. I don't for the life of me understand why it's such a big fuccking deal to the PC crowd. 
Because radical Christians see the secularisation of public schools and the work place as another talking point to win more to their side.
On face value, their arguments may sound reasonable; everyone likes Christmas. But people don't realise how sick their true agenda is.
I'll give an example: In school there was this girl in history class wearing a 666 shirt. Well she went to the restroom, and someone made the comment,
"we should take her out and burn it." The teacher, being a radical Christian, actually agreed saying, "if things were different, I probably would."
These wackos are very insidious; I think above all, keeping schools free of anything remotely religious sends a message to these people.
It's a big fuck you. They need to know that their religious fascism will NEVER gain control of this country.
And in the meantime, I'm free to enjoy Christmas trees as much as I want, as a secular holiday.
Or even in the original pagan sense. : )