Why don't you just read up some on the matter
It's been well reported
Several officials warned the amount of compromised material may be much broader than even Snowden has suggested and that officials are not sure they know everything he may have pilfered. Another official said even the damage assessment won’t be finished for some time.
Among the chief concerns, according to those officials:
Technical Roadmap of the U.S. Surveillance Network
Before he fled Hawaii for Hong Kong in late May, Snowden allegedly downloaded significant amounts of information about some of the country’s most sensitive secrets — specifically how the U.S. government does surveillance abroad. One source told ABC News that as an information specialist with security clearance “he understood the framework of how the whole U.S. surveillance network works.”
In short, Snowden’s stolen material would help America’s adversaries understand how we use electronics to spy.
Another official said Snowden had access to a particularly important computer server in the government’s system “which contained ridiculous amounts of information” totaling hundreds of pages worth of secrets. He is suspected of storing stolen material on computers and making copies of documents. At risk is the effectiveness of billions of dollars worth of supercomputer and clandestine spying resources.
What Snowden May Know About Human Ops
Beyond technical systems, U.S. officials are deeply concerned that Snowden used his sensitive position to read about U.S. human assets, for example spies and informants overseas as well as safe houses and key spying centers.
They worry this recent quote from Snowden was not an exaggeration: ” I had access to the full rosters of everyone working at the NSA, the entire intelligence community, and undercover assets all over the world. The locations of every station, we have what their missions are, and so forth.”
So it’s not just about what he took, but what he knows, officials emphasize. Officials describe Snowden as a walking treasure trove, a dream for foreign intelligence services. One intelligence official called Snowden and his cache an “entire U.S. government problem.”
Known Damage Already
A senior intelligence official said: “The intelligence community is already seeing indications that several terrorist groups are in fact attempting to change their communication behaviors based on what they’re reading about our surveillance programs in the media.”
In an interview with CNN today, Secretary of State John Kerry said that “people may die as a consequence of what this man [Snowden] did.”
“It is possible that the United States will be attacked because terrorists may now know how to protect themselves in some way or another, that they didn’t know before,” he said.
how would you gain access to classified info if you publicly previously criticized the government?
” I had access to the full rosters of everyone working at the NSA, the entire intelligence community, and undercover assets all over the world. The locations of every station, we have what their missions are, and so forth.”
no, I am saying he may have had a hard time getting a job at the NSA if he was a critic of them...
if he did it "anonymously", how do they know it is him?