There were/are lot's of holidays centered around the winter solstice so I agree that we would probably be celebrating something if Christmas did not exist, it would have likely carried over from one culture to another (usually does).
I'm not sure what any of this has to do with atheists trying to derail a 60 year old christian tradition of celebrating Christmas in a park though.
I believe half of the things I say and say half of the things I believe.
It's a myth perpetuated by the religious that you have to be religious to be caring. It's a flat-out lie.
The Jehova's Witnesses, for example, are a sect that exists all by itself because if a disagreement with every other sect over what one particular verse actually means -- they're not ignoring it, they're not reading it selectively, they simply understand it differently.
As far as it goes with the old testament (especially Leviticus), you have to keep in mind that when Jesus Christ showed up, the Bible portrays him as the replacement for all the laws that came before -- not because there are no restrictions in the wake of Christ's first coming, but because the vast bulk of the laws that predated him had to do with how to be righteous and how to assuage god's wrath when you fall short of being righteous. For example, Christ's death on the cross replaces the sacrifice of animals, only better -- animal sacrifice covered the since, Christ's blood washed them away. In the wake of that paradigm shift are some much simpler principles -- believe Jesus is your savior, and whatever treatment you show to the least significant person on the face of the earth you are showing to Jesus Christ.
The Christians who have a hard-on for Leviticus are ignoring this simple truth. They take the whole Bible as being the unblemished word of god, rather than a long-term record of god's relationship with Israel, vast swaths of which are ultimately replaced, altered or updated by Christ's sacrifice. God didn't change, but the relationship underwent some serious modifications. These same Christians are also ignoring the historical realities behind the Bible, the reality of what translation does to a text, and treating many passages which are simple recordings of what happened as god's stamp of approval on those happenings.
I'm already gearing up for Finger Vote 2014.
Just for reference, means my post was a giant steaming pile of sarcasm.