@Lash,
Lash wrote:I think they revealed that others were guilty of killing innocent people, furthering the cause of terrorism, and perverting democracy.
None of them revealed any crime of any sort.
Manning however revealed the names of secret democracy advocates within brutal dictatorships, potentially getting some of them killed, and definitely eliminating any possibility that they would be able to secretly work toward democracy in their country.
Manning also revealed combat techniques used by US soldiers, which helped Iraqi insurgents learn how to kill Americans better.
Snowden revealed the techniques that the NSA uses to root out terrorist communications, thereby giving the terrorists an idea how to plan their attacks without getting caught. He also ensured that the NSA was busy with damage control instead of spending their energy looking for terrorists. It is possible that if not for Snowden the NSA would have detected the recent truck attacks in Europe in time to stop them.