Some Jews do have Christmas trees in their homes, although it's not a common practice. Christmas trees are a symbol of the Christmas holiday, which is a Christian tradition. For Jews, the holiday of Hanukkah is the more relevant one. Hanukkah celebrates the rededication of the Temple in Jerusalem, and is marked by lighting the Menorah and exchanging gifts. While Christmas trees are not a part of Jewish tradition, some Jews may choose to have them in their homes as a secular decoration or simply because they like the festive atmosphere.