As a social tool, the Israeli documentary Naza aims for change on two fronts: It hopes to energize a defund-the-IDF movement in the US. while swaying an electorate as it heads to the polls next month in Israel.The success of the second goal — “to penetrate the walls of justification and silence in Israeli society,” as director Yuval Abraham put it — will play out in the coming weeks 6,000 miles from these shores as voters decide whether to return Benjamin Netanyahu to office. But the first aim saw a key opening step this weekend as Abraham and his co-director...