Roosevelt is telling the American public that maintaining an isolationist policy amidst the war will not protect them. All the freedoms that he listed on his speech would be threatened by the march of the Axis powers and it would be a matter of time when they have to confront this threat.
Perhaps they will lead Roger to commit other crimes and do other devilish things, or perhaps they will weigh heavily on his conscience as a result of his dishonest means of procuring them.
