NETANYA, Israel — The elderly men and women trickled in one by one, carrying physical scraps of memory: yellowing letters and postcards, old photos, personal belongings and frayed documents left behind by relatives who lived through the Holocaust. At tables set up in a senior citizens home in this coastal city, the visitors talked as interviewers listened and took notes. The stories swirled through the room — told in Hebrew, Russian and Yiddish, conjuring up the painful past as pictures and papers were carefully passed back and forth, examined, read and registered.