When Jews left their communities and moved to the suburbs in the 1940s-1960s, they “usually abandoned their synagogues”
When Jews left communities such as Lawndale in Chicago or the near east side in Columbus, Ohio, and moved to suburbs either inside or outside the city, they usually abandoned their synagogues (just as white Christians abandoned their churches). Of course, there were exceptions. As the black population exploded in the Hyde Park-Kenwood area of Chicago in the 1940s and 19505, K.A.M. made a commitment to remain in the neighborhood and worked vigorously to create a fifty-fifty balance of whites and blacks. Rabbi Jacob J. Weinstein could claim, at the end of the 1950s, that “this temple was the single most effective anchorage in holding the white people here.” This was no easy task, as he also noted in a Yom Kippur sermon, for the “movement to the suburbs is, in the framework of our social and economic mores, almost as natural and instinctive as the flight of the birds to Capistrano.” And, in postwar Philadelphia, rather than flee the city, Mikve Israel and Rodeph Shalom reinvented themselves and remained in the city center as their congregants (and other synagogues) left North Philadelphia for the northern Philadelphia suburbs and beyond the city limits. Such congregations, however, were the exception.
Most abandoned synagogues became black churches, and Jews, in their new communities, either built new buildings with the same synagogue name as the old or started over with new synagogues with new names.
Marc Lee Raphael, The Synagogue in America: A Short History (New York & London: New York University Press, 2011), 125.