In the wake of the 9/11 attacks, 1,200 Muslims were arrested. Some were beaten (this is according to the Justice Department's own Inspector General of the time). Hundreds were held for months. Absolutely none of them were found to be with al-Qaeda.
These are just two examples of MANY. You know what's scary? The spying that the NSA, FBI, and CIA do gets people put on lists. There are lists of people to arrest in the event of an attack. Hoover of the FBI had something like 70,000 people on a list during the era of Communism fear. The vast majority of those people were innocent of any crime.
Over the past century, these lists have been kept openly and kept secretly when different administrations denounced them. But they have been kept (at the FBI at least. Hoover hid them illegally). Letting the NSA spy on us and treating us as if we were assumed criminals before innocent is a terrible way to waste away your fundamental rights.
And the scary thing is we wouldn't even have known that we were being spied on for sure unless Snowden said something.
These are crimes against the American people. You can't tell me that the FISA court not rejecting any warrants is a good thing. Out of tens of thousands of requests, not one gets rejected? That is a failure of the checks and balance system our founding fathers set up. THAT is definitely a crime against the American people.