I suppose if it helps to think that everything the WTS says is untrue. But there are truths and many Christians who do not follow the WTS do not celebrate Christmas.
What actually drew me in was that they considered themselves Christans and did not worship Christmas. What drew me out was the organization itself, but
that does not make everything that you already know and learned invalid. In fact, most of the world knows these things.
Consiider this, if it is not about centuries old tradition based on something, then use no trees, don't speak about Santa and especially not allow children to pray to Santa. Matter of fact, don't call it Christmas but something like "festivus". Will your family accept you if you did this, or will they insist that if you celebrate Christmas, you do it "right"?