Actually, he was. It was then of course not called a Christmas tree it was called an Ashera. A pagan fertility Goddess. When the good kings of Israel tore down the high places, even they dared not to remove the “Christmas” tree. It was so dear to the hearts of the people, dressed in ribbons of silver and gold with tinsel and colorful balls.
Or perhaps that was all coincidences...
I for one find it astounding that modern Christians think that setting up a pagan God in the living room is a fitting way to worship the God who said something to the effect Thou shall not have any other God before me. But then I am hopelessly old fashioned and really take Him too seriously...
I see no evidence that ashera poles looked anything like Christmas trees, and there certainly is no historical continuity between the two, since Christmas trees originated in medieval Germany and were popularized by Martin Luther.