I believe they are all related. The US Government is terrified that if the truth is exposed about the true nature of their Empire, it will be cause for great concern, and for regime change in the USA. If 9/11 was a controlled demolition, and planned with the Governments knowledge and possible co-operation, than many other questions will arise from that.
The Iraq war was a scam to control the oil of the Middle East and to overthrow Saddam Hussein. The Arab Spring toppled many Middle East tyrants who were puppets of the US, and the replacement of dictators with democratically elected governments were of major concern. Occupy popped up, and the US government really freaked out. They saw the potential to repeat the Arab Spring here in the USA. Anonymous was another threat that they took seriously.. Very seriously.
Then came whistle blower Bradley Manning, the Wikileaks documents and Julian Assange. A very large part of the secrets they had tried to hide from the public were now exposed. Another major freak out.
Nd now we have another whistle blower, Edward Snowden, releasing the NSA documents and the extent the US and UK governments willspy on thier own citizens and everyone else in the world. Another very large revelation. More freaking out.