Complex sentence: In 1938, when racial laws were passed by Italian Facist government, Levi-Chivita--who is Jewish--lost his professorship, membership in all scientific societies, and eventually died isolated from the rest of the scientific world in his apartment in Rome in 1941.
Split into simpler sentences: In 1938, when racial laws were passed by Italian Fascist government, Levi-Civita, being Jewish, lost his professorship and membership in all scientific societies. He eventually died isolated from the rest of the scientific world in his apartment in Rome in 1941.