Though the synagogue had always called itself
Orthodox, it also had liberal leanings, and in 1931 it affiliated itself with the United Synagogue of America (now
United Synagogue of Conservative Judaism). That year Beth Israel hired Samuel I. Porrath as rabbi, a position he would hold until 1935. Porrath subsequently moved away from Niagara Falls, but would eventually return. Though employed elsewhere (including
Temple Beth El in
Buffalo, New York, and
Niagara University, where he chaired the Institute of Transportation, Travel and Tourism), he would often serve as Beth Israel's interim rabbi when the congregation was between permanent rabbis. A founder of
Niagara County Community College, Porrath was appointed Beth Israel's "Rabbi Emeritus" in 1968, and died in 1989. After Porrath, Beth Israel went through another series of short-tenured rabbis: Jacob Friedman (1936–1937), Herman Glatt (1938–1940), and
Mordecai Waxman (1941–1942). Waxman would subsequently serve as an
Army chaplain in
World War II, go on to become a prominent rabbi in the Conservative movement, and serve as rabbi of Temple Israel of
Great Neck, New York from 1947 to his death in 2002. Waxman was followed by Simon Shoop (1942–1943), Philip Miller (1943–1944), and Jay Kaufman (1945–1946). In 1947 Beth Israel also hired Melvin Kieffer; he served until 1957, the synagogue's longest serving rabbi, Kieffer was followed by Seymour Schorr, who was hired in 1958. ==New building==