As I often tell my Mom in phone conversations: The things I'm saying probably have gotten me reviewed by some government agent.
The good news is that if they listen, they'll realize I'm not a terrorist and put me in their "Just a Patriotic American, no problem here" file with 100,000 other people.
If somebody extremely dastardly gets elected who might use that file for harm, I'll just have to flee.
Oh, you missed the statements be the ex-head of the NSA just a couple days ago I take it. He said that government transparency groups are 'the next terrorists.'
Besides, it's not a human you have to fear. It's their automated systems. They'll set up a system to analyze and profile communications, and it will just spit out names. They'll declare those people terrorists and round them up and not charge them with anything. And as long as no individual NSA agent actually reads your communications, everyone will apparently be happy. Well, except for the people getting waterboarded by CIA agents who just KNOW you MUST have done something terrible, because the information they got about you is called "intelligence" and therefore can not be incorrect.
I think they are pretty open, now, if you are a US citizen (I am). Although there is a federal police force "guarding" them, so they could be closed instantly. If it looks like that might happen, I'll have to leave, or risk staying. Right now, that doesn't seem likely to happen in the immediate future.
DHS just got another budget increase for you...revolutionaries and secessionists are major concerns of every government and are classified as terrorists. Check it out.
If you want to go back to the beginning of where we are today, you probably want to read something like Secret Armies by John Adams. Special forces were spawned to wage low-intensity conflict/warfare and attack or respond to unconventional threats.
The terrorology field has blossomed post-2001 and there are more definitions, but everything still files nicely: state/non-state and religious, political, cultural. If you ask me, they're all the same.
Regardless of what the lawyers--politicians--add to the body of definitions, definitions of terrorism are very gray unlike conventional war.
Low-intensity conflict is how wars are waged today and the definitions aren't as black and white as conventional war.