Christmas trees are not tree worship. The tree is a dispensary of Christian alms. As I've said in another thread, it doesn't even have to be a tree, and the earlier tradition was to leave presents in unattended shoes. Does one then worship shoes?
And the Babylonian connection is tenuous at best since last I checked the Babylonian and Germanic cultures don't overlap.
It was the 17th to the 23rd inclusive, it never touched the 24th or 25th (according to the
Chronography of 354), and Christmas Eve wasn't a thing until later. So, Saturnalia is over for an entire day before Christmas began. The two never overlapped.
The "evergreens" used in Saturnalia were laurels, so to say that this is a parallel is simple equivocation and a fallacy. The laurels were not decorated, they were the
decoration. Gift giving was part of Chanukah as well, and if you think that merry-making is pagan then there is no helping you.
I'm surprised that Britanica doesn't mention the mid 4th to early 6th century
Praxis de Stratelatis and the 8th century
Encomium of Andrew.
Yes, because
reindeer are native to Mesopotamia and the Mediterranean now?
The sleigh and reindeer are 17th-19th century additions to the tradition. Far beyond when the Roman Empire and its religions were more than dead.
Nimrod's birthday was not December 25th. No primary source attests to that. He is also not associated with evergreens, nor reindeer (there is a
single carving that depicts Nimrod with a
Persian fallow deer, but it's not his "associated animal" or a common depiction, or any other such nonsense – it's a one-off).
It's as much a pagan celebration as the
Lincoln-Kennedy Coincidences are significant.
(Which is to say not.)