Among Arabs, Dashed Hope Brought Resentment to a Boil
Arabs in Bethlehem, who nine months ago celebrated withdrawal of Israeli soldiers, now speak bitterly in their rock-strewn battleground of dashed hopes for peace and anger that erupted into deadly fighting; photos; Palestinians point to work and travel restrictions, economic blockades and new Israeli Government that has not carried out parts of peace agreement; say opening of entrance to archeological tunnel in Jerusalem was only final provocation (M)