Man-made religions / events with family & friends

[Director Michael]

Said Rabbi Yitz:
"Certainly one should avoid the idolatrous aspects such as mistletoe, the yule log, the tree etc. which all are throw-backs to the winter solstice pagan celebrations."

(This i am sure is laid out in detail in the Noahide Commandments book.)

Yes, it is laid out in detail in the book "The Divine Code" by Rabbi Moshe Weiner:
https://asknoah.org/books/the-divine-code

May i:
- Admire the 'pretty tree'
- Decorate the tree
- Help put up the decorations, or manipulate the decorations (turning on the colored lights, straightening up something which is fallen etc.)

From "The Divine Code," 4th Edition, Part II, topic 8:10 -

"In private houses or businesses, it appears that they [the customary trees] are not forbidden for benefit if they bear no symbols of the religion, if they are used only as a custom and not as an aid in worshiping [the idol] with prayers or songs. They would certainly be permitted for benefit after being discarded (a clear act of nullification.)"

- Accept gifts handed out from beneath the tree

From "The Divine Code," 4th Edition, Part II, topic 10:2 -

"If one is afraid that others may be angry at him for not participating, or he is afraid of reprisals from the idol worshipers, it is permitted for him to attend and appear as if he is participating, for he is only flattering the idol worshiper, and does not attend out of any acceptance or recognition of the idol...
On a day that they celebrate by giving each other gifts that by their tradition are in honor of their idol, it is permitted to participate in this if it is considered by both parties (the giver and receiver) as only a custom, with no connection to the idol. But it would be better from the outset not to give gifts on that day..."