One thing to remember is that the early ancestors of the JW cult used to celebrate Christmas themselves.
They quit just about the time they thought up such stuff as the end of the world in 1925, the literal 144,000 and the Great Crowd, "millions now living will never die", the earthly immediate resurrection of the men of old, and the mandatory door to door service. Note that when they rejected Christmas, other important doctrines such as the smoking ban and the blood transfusion law were just a gleam in somebodies eye. Note also that they were being led by a hopeless megalomaniac and alchoholic bully given to explosive profanity. Point being that they just made this stuff up as they went along, and the people making it up were seriously disturbed people.
Considering the track record on that clap-trap of doctrine, I don't think they have much right to claim "divine intervention" on the Christmas holiday.