Jim Jones was an ordained minister of a major denomination. He did not accumulate his flock under the banner of socialism. And Hitler paraded under the banner of Christianity.
One has to wonder how all the German people, most of them nominal Christians, were able to gain access to Hitler's secret conversations, as translated into French, then into English.
I would think most of the people who elected him and followed him would have had more access to his published writings and speches.