I believe Metatron nailed it. From the Bible Teach booklet, p. 159:
"Some agree that such holidays as Christmas have pagan origins but still feel that it is not wrong to celebrate them. After all, most people are not thinking about false worship when they observe holidays. THESE OCCASIONS ALSO GIVE FAMILIES OPPORTUNITIES TO DRAW CLOSE TOGETHER. Is this how you feel? If so, likely it is love of family, not love of false religion, that makes taking a stand for true worship seem difficult. Be assured that Jehovah, the one who originated the family, wants you to have a good relationship with your relatives. (Ephesians 3:14, 15) But you can strengthen such bonds in ways that God approves. Regarding the matter that should be our chief concern, the apostle Paul wrote: 'Keep on making sure of what is acceptable to the Lord.'" (Emphasis mine)
The Watchtower's holiday policy makes quick work of dividing Witnesses from non-Witness family.
BTW, has anyone read the article, "Are They Idolatrous Decorations?" beginning on page 12 of the December 22, 1976 Awake? The article purported to be about the heart symbol, which is claimed to have been used in pagan worship in Babylon. The article's bottom line?
"So the Christian needs to be primarily concerned about what? Not what a certain symbol or design possibly meant thousands of years ago or how it might be thought of on the other side of the world, but what it means now to most people where he lives...Though this was a religious symbol in ancient Babylon, does it now have such a meaning where you live? Most likely not...In that case, some Christians might feel free to use the heart-shape simply as a decorative design." (pp. 14-15)
Too bad they can't use the same logic in relation to Christmas, which encyclopedias say "is theorized" to be associated with ancient pagan customs, with no solid proof. Of course, the article wasn't really about hearts anyway. It was about trying to justify the pagan winged sun disk that graced the covers of the Studies in the Scriptures for many years.