The decorated tree in Jeremiah 10 is not a Christmas tree since Christmas did not exist back then. What we do see in that passage is a warning from Yahweh to not learn the way of the heathen. The modern Christmas tree is rooted in paganism as can be seen in the following excerpt from a secular website. They have no axe to grind. (No pun intended).
Long before the advent of Christianity, plants and trees that remained green all year had a special meaning for people in the winter. Just as people today decorate their homes during the festive season with pine, spruce, and fir trees, ancient peoples hung evergreen boughs over their doors and windows. In many countries it was believed that evergreens would keep away witches, ghosts, evil spirits, and illness.
In the Northern hemisphere, the shortest day and longest night of the year falls on December 21 or December 22 and is called the winter solstice. Many ancient people believed that the sun was a god and that winter came every year because the sun god had become sick and weak. They celebrated the solstice because it meant that at last the sun god would begin to get well. Evergreen boughs reminded them of all the green plants that would grow again when the sun god was strong and summer would return.
The ancient Egyptians worshipped a god called Ra, who had the head of a hawk and wore the sun as a blazing disk in his crown. At the solstice, when Ra began to recover from the illness, the Egyptians filled their homes with green palm rushes which symbolized for them the triumph of life over death.
Early Romans marked the solstice with a feast called the Saturnalia in honor of Saturn, the god of agriculture. The Romans knew that the solstice meant that soon farms and orchards would be green and fruitful. To mark the occasion, they decorated their homes and temples with evergreen boughs. In Northern Europe the mysterious Druids, the priests of the ancient Celts, also decorated their temples with evergreen boughs as a symbol of everlasting life. The fierce Vikings
in Scandinavia thought that evergreens were the special plant of the sun god, Balder.
History.com
So what is the reason for your Christmas tree? It has absolutely nothing to do with Christ. It is not commanded by Yahweh or Yeshua. It was not a practice of the early believers. Let's face it, you have been duped by merchants who make big bucks off of the sales of "religious" goods. Easter bunnies, Christmas lights, wreaths, holiday cards, Christmas presents, and over a billion dollars in Christmas tree sales each year in the U.S alone. Those who celebrate the man-made holiday called "Christmas" have learned the ways of the heathen well. The sad thing about it is that in their attempt to justify their pagan practices, they will portray Christmas opponents as grinches and scrooges. Even sadder than that is how Christians, who know full well how the Almighty feels about lying, have no problem lying to their children about Santa Claus and "Jesus" being born on December 25.