Cracks soon appeared, though, with then opposition leader Benjamin Netanyahu calling Oslo a mortal threat to Israel. The Israelis accelerated their project to settle Jews in the occupied Palestinian territories. The recently emerged Palestinian militant group Hamas sent suicide bombers to kill people in Israel and wreck the chances of a deal. The atmosphere in Israel turned ugly, culminating in Israeli Prime Minister Yitzhak Rabin's assassination by a Jewish extremist on 4 November 1995.