Couldnt find a single reference that made a claim that Karl Pribham renounced his Jewish upringing or his religious practices.Ex-Jews, David Bohm and Karl Pribram, drew on the teachings of J Krishnamurti to formulate a holonic model of the human brain. Bohm was a close disciple of Krishnamurti. There's a vid in which Bohm, Sheldrake and a few others are seen listening to J Krishnamurti in an elegant living room.
In fact there is an entire Google page devoted to keywords "Karl Pribham" and "Jew"
List of Jewish American biologists and physicians