By Michelle Nichols UNITED NATIONS (Reuters) – The United Nations on Tuesday demanded an immediate humanitarian ceasefire in the Israel-Hamas war after more than three-quarters of the 193-member General Assembly backed the move, which had been vetoed by the United States in the Security Council last week. The United States does not have a veto in the General Assembly. It voted against the resolution, along with Israel and eight other countries. The resolution was adopted to a round of applause with 153 votes in favor, while 23 countries abstained from the vote. Palestinian U.N. envoy Riyad Man…