Adolf Hitler blamed Germany's defeat in World War I on Jews and Communists.
Hitler repeatedly cursed them for losing to Germany and for most of Germany's problems. As for Communists, Hitler had hatred towards them. One of the senses for the presence of the Nazi party was to take action against the Communists. Hitler even considered that the Germans and Communists were employed closely in a united scheme to end Germany. Hitler did not like the Gypsies either, but he did not accuse Germany's loss on them.
Many say that Truman was justified in dropping the first bomb and it kept a land invasion of Japan from occurring but that he didn't give the Japanese enough time to surrender and that the second bomb was ethically problematic.