Tens of thousands of people demonstrated in Tel Aviv and other Israeli cities for an agreement to release around 100 hostages held by Palestinian Islamist Hamas on Saturday. “We must not sacrifice any more lives; we must not sacrifice them [the remaining hostages],” said a relative of a hostage who died last week, at the Tel Aviv rally. Carmel Gat, another woman and four men were shot at close range last week, according to Israel’s Health Ministry, after Israeli soldiers found their bodies last Sunday in a tunnel in Gaza. “The six would be here with us today if [Israeli Prime Minister Benjamin…