It was very long ago but I still remember the political science prof explaining that one of the things you might expect to hear from a totalitarianism regime is the line, "If you're not with us, you're against us". That was like 30 years ago and it's surprising how much of those lectures I can still recall in the light of current events of the past few years. We spent most of an hour on that phase and it's implications.
In common usage the term terrorism has come to mean anyone opposed to the administration or its policies. The popular term for such things used to be communist. Now it's terrorist. It's become just a word you can call someone you don't like. Give them that label and you are drawing attention to them. Even if you retract it later, your words still tend to stick.
Anyway read all about it. I give no links, it's all over the web...