For me, Stalinism was even a greater philosophical problem than Nazism. Under Nazism, if you were a Jew, you were simply killed, no questions asked, you had nothing to prove. Under Stalinism, of course, most [victims] were on trial for false accusations; most of them were not traitors. There is one interesting feature: that they were tortured or through some kind of blackmail forced to confess to being traitors.