It boggles the mind how stupid and corrupt Kennedy is. The Soviet Union was a powerful and evil enemy. Kennedy was helping a foreign power that easily could be in a war with America, even a nuclear war. It was like giving Hitler pointers against FDR.
The apple doesn't fall from the tree. His father was somewhat supportive of Hitler's Germany while he was ambassador to England. FDR recalled him from his post because of Joe Kennedy's belief that Germany would overpower England.