Thus we are not to take their holiday's and "convert" it into a christian one. We even adorn "christmas tres" with silver and Gold.
Trees and flowers can be used in the worship of God. The Temple was full of such things craved into the walls and doors. Nothing wrong with them at all, IMHO. Christmas trees are seasonal decoration. No one worships them that I know of. They are packed down or thrown out for the trash man to pick up.
Thus Christmas is no more than celebrating the sun over the dark time in the calander thus the sun is replaced by Christ but we are still reverencing the sun rather than Christ on christmas.
Sun and Morning Star are also names of Christ.
Mal 4:2 But unto you that fear my name shall the Sun of righteousness arise with healing in his wings; and ye shall go forth, and grow up as calves of the stall.
Rev 22:16 I Jesus have sent mine angel to testify unto you these things in the churches. I am the root and the offspring of David, and the bright and morning star.
Anyhoo, my two cents.