Then why does he think Manning the traitor is a hero?
Because he's got this idea that the government (including the military) ought to have no secrets. Meaning that Manning was a hero for daring to divulge these secrets at the risk of losing his personal freedom. That Paul is the only major candidate in either major party that holds this view gives some idea of how deeply strange this particular position is.
As I've hinted earlier, Paul is probably an anti-semite, because of his fixation on Israel even though we have plenty of military welfare dependents around the globe. In other respects, he's either unworldly or a champion of our enemies' interests against our own. Bottom line - the guy's foreign policy is seriously unhinged.