"The political powers that be have a tendency to exploit minorities for their own political ends," Hans Morgenthau said at Harvard last night-referring not to blacks in white America, but to Jews in Soviet Russia.

"Jews in Russia are willing to rend unto Caesar that which is Caesar's, but they are not willing to give unto Caesar that which is God's," said Morgenthau, who is professor of Political Science at the City University of New York.

Morgenthau's statements set the tone for a seminar held yesterday on the problems facing Soviet Jews. John Armstrong, professor of Political Science at the University of Wisconsin, and Richard Pipes, professor of History at Harvard, presented analyses of anti-Semitism in the Soviet Union today.

Neither was very optimistic. "The majority of Jews feel very little securityin Russia today," Armstrong said. Distrust by the governing elite and popular identification of Jews with the Soviet Union's rulers, he said, "have caught the Jewish people in a bind."

Pipes was even less hopeful, "I cannot see any future for Jews in Russia," he said. "I would not be surprised at all to see a great worsening of their situation."

The seminar, held in Emerson 105 before an audience of 200 people, was sponsored by the Harvard-Radcliffe Hillel Society and a national organization called the Academic Committee on Soviet Jewry.