For athiests it won't matter but for those who still believe here is what cleared my mind about holidays......
1. First was noticing how many other christian faiths are far more christ like then JW's
2. Then I asked some of them if they knew about the origins and what allowed them to be able to celebrate it. On JW reasoning if anytime in the past thousands of years it had a bad origin, it must not be done, but their answer was, "I am NOT celebrating or worshipping pagan gods, it's about Christ and God sending him to us for our sins. When the entire world was pagan, changing those pagan practices to something christian wiped out paganism and took the bad out of them."
3. Along w/ the above, in the bible I read the scriptures about not judging the man who puts more importance on one day above another, but doing all things for God's glory. With that scripture, since the celebration is being done in appreciation for God sending his son, that goes with that.
4. Another scripture (I forgot offhand where both are and I gotta run or I'd look them up real quick)..the other is about not judging the one who chooses to observe a sabbath or moon or another day.
5. If doing a christmas tree, not using any angels or anything on it, for example ornaments of smores, pizza, places traveled, trains, snowmen, etc didn't even exist 2,000 years ago so can't even put a pagan origin on those. Can call it a memory tree, ornaments of every place traveled or vacation had, etc.
6. The tree originally was plain with just candles on it and gifts all over it. Electric lights on trees and on houses aren't pagan, they weren't done until the past 100 years. It's a modern winter decoration.
7. The bible says anything out of love has no law again, the law was summed up in love God with whole heart soul and mind and neighbor as yourself. So christmas is loving God for sending his son and loving family, getting together with them, and loving neighbor, taking extra effort to help others. JW's don't do any of that during this time, they don't do charity or help for poor, and find wrong in every tradition that brought family together so they grow cold and apart.
So for me personally, I see scriptually nothing wrong and to be on the safe side, I chose to keep angels, anything that could be thought of as idol out of it.