Anyway, you make good points. But regarding the Arab Spring, even if Manning was indeed a catalyst for these movements (which I highly doubt), having an uprising does not always lead to thousands of deaths. As you can see those who were responsible for the deaths in these countries were the government leaders who refused to listen to the crowd and sent the army and tanks instead of promoting dialog. The responsibility for these deaths is very clear and it would have nothing to do with Manning.
And your reference to the "invasion of Iraq" as "formation of democracy" is dubious at best. Installing a puppet Pro-US government is hardly anything democratic, and the elections process in Iraq have been showing many issues (threats on voters, fraud, etc...). Hardly a good example of a "democracy at work".