Yeah, I've known about the Christmas tree verse since I was a little kid. I was Missionary Baptist to age 7, then from 7-16 I was in World Wide Church of God and they thought they were the only ones going to heaven. LOL We observed only Jewish holy days, not American holidays. When I was born again at age 16, I got us out of that church immediately. Funny how being born again can immediately clue you in to false teachings even though you don't know how they're false intellectually.
I'll give you my take on Jeremiah 10:2. Back in those days, this is what was being described: The Pagans would cut a tree down, place it on an alter and decorate it. Then, they would hold hands around it, naked, dancing and then having sex. The Catholic prayer beads come from this exact practice. The circle beads are representing the people holding hands around the tree on the alter, and the line of beads coming off the side holding the cross used to hold an ahnk (the cross with a tear-drop shape for its top). The ahnk was the symbol for Ashra's son, and the tree on the alter represented Ashra. It would lose all its branches eventually as it died off, and it would be called an Ashra pole. The Catholics simply changed the ahnk to a cross. At times, Israel did these things, because evil kings would come in and they would completely get rid of the Law and it would be lost for many years. So God is not warning these people about Christmas and Christmas trees. He's warning them about the Pagan ritual of worshipping Nimrod on December 25th which involved the tree, nudity and sex.
Catholics rehashed some of these old ways when Paganism and Christianity got mixed. Constantine mixed a lot of Paganism in with Christianity. So, they brought the December 25th date over and claimed Christ was born on that day and worshipped Him instead of Nimrod. However, we're pretty certain now that Christ was born in the fall on Feast of Tabernacles, around October 1st, and His conception date was most likely December 25th, exactly 40 weeks (the length of a pregnancy) before October 1st.