The first Israeli-Palestinian meeting sincelast week's Cairo peace summitonly plunged relations deeper into crisis, as Israeli Prime Minister Yitzhak Rabin and PLO Chairman Yasser Arafat failed to agree on any way to expand Palestinian authority without endangering Israeli security. After 2 1/2 hours of talks, a visibly angry Arafat lashed out at Rabin's refusal to lift a 19-day closure of the West Bank and Gaza Strip, imposed after militant Islamic Jihad bombers killed 21 Israelis last month. "If there is an Israeli wish for political separation, then we welcome it. But we will not welcome that they lock us in Gaza and the West Bank and hold the keys to the big prison." But Rabin said the PLO leader must do more, including disarming his terrorist opponents.