This is about "freedom of religion". People in the world are supposed to analyze their religion so they can become jokehovian witlesses. However, once one becomes a jokehovian, one must remain a jokehovian and not look elsewhere. And that goes for celebrating Christmas--seems the new viewpoint is that people in the world can celebrate Christmas, but we are supposed to be uncomfortable and worry ourselves sick about being drawn to it. It's just that we no longer try to stop them.
Any active jokehovian trying to celebrate Christmas while active is still going to have Brother Hounder to contend with. This is similar to the blood and voting issues, even if the washtowel does downgrade it to a "conscience matter". Jokehovians are notorious for imposing their conscience on everyone else, and all it takes is one hounder to say "Don't do it because you will make others think it's acceptable" for any action to be banned. Do it anyways, and you will get a "brazen conduct" hearing--and "brazen conduct" is not a "conscience matter".