Where did you get the idea it was wrong to celebrate Christmas and that everyone has to see it that way?
From the Watchtower, which you now know isn't "Jehovah's organization" or "the truth." See how powerful their indoctrination can be? You don't believe it any more but you still have the emotions they programmed into you.
Romans 14:5 says that what days we do or don't celebrate is a matter of personal conscience: "One person considers one day more sacred than another; another considers every day alike. Each of them should be fully convinced in their own mind."
Follow your conscience in this matter, but don't let your conscience be controlled by 8 men in New York who falsely claim to speak for Jehovah.