Israeli Army Captures Buildings In Palestinian West Bank Town
Israeli forces take control of parts of Palestinian town of Beit Jala to stop snipers who have been firing for months on Gilo, neighboring Israeli area on southern edge of Jerusalem; Palestinians charge 'reoccupation' of area supposedly under their control; soldiers also move into Lutheran church compound, using top floors to shoot at gunmen who continue firing on Gilo and on Israeli troops; thousands of Palestinians vow revenge for killing of Mustafa Zibri (Abu Ali Mstafa), leader in Popular Front for Liberation of Palestine and PLO who Israel says was sponsor of car bombings and other terrorist attacks; US warns against raising stakes in conflict; Israeli officials say they have no intention of remaining in Beit Jala but will stay put until there is no more shooting on Gilo; Gen Gershon Yitzhak points out that Palestinian Authority 'did not do its job' in Beit Jala, predominantly Christian town of about 10,000 people; photos; map (M)