Yes, Jewish people do put up Christmas trees, although it is not a traditional part of their religious practices. Some Jewish families choose to have Christmas trees as a way to embrace the cultural aspects of the holiday and to participate in the holiday spirit. Others may choose not to have a Christmas tree as a way to preserve their own religious traditions and beliefs. Ultimately, it is up to the individual family to decide whether or not they want to celebrate the Christmas holiday and if they want to have a Christmas tree.