Why do people put up Christmas trees at Christmas?

Since the earliest of times, trees, especially green evergreens, were worshipped by the pagans. To them it represented life and freshness. Since it was EVER green, it always had life. The trees were worshipped as symbols of life, fertility, sexual potency and reproduction. These pagan rituals of worship were then brought into the homes and set up as idols, with the belief that it would give men a heightened potency of sexual virility to procreate new life for their harvest god in the new year. The evergreen tree represented a "PHALLIC" symbol (the mans sexual organ of reproduction) set in an upright position.. When the Church appropriated pagan symbols, traditions and dates to have people worship God, they used the Winter Solstice time of year to impose the celebration of Christ's birth, or Christmas. The tree was brought into homes and decorated in Europe in the 17th century, and Europeans brought it to North America. The Bible does not tell us to celebrate Christmas.