BLOOMFIELD, N.J. — Israel’s right to exist and to defend itself as a refuge for Jews, and the importance to the working class everywhere of the fight against Jew-hatred were central to discussions that Socialist Workers Party campaigners had knocking on doors and introducing themselves at supermarkets. They described the SWP program, offered the Militant and books by SWP leaders and other revolutionaries and signed people up to win ballot status for Rachele Fruit, the party’s candidate for