Marxist radicals were centered in Frankfurt Germany and in competition with the Nazis for control of Germany. When the Nazis won political control over Germany the Marxist radicals left Germany before the Nazis could kill them. They migrated in Europe for a while and eventually came to America where they set up shop in New York. They then set an agenda of taking their Marxist ideology into the educational institutions of America. They succeeded and now their disciples control the university system in America.