When democracy fails or ends itself, and peaceful attempts to restore it are unsuccessful, violence must be used (with a strong preference for violence against property rather than people, of course).
Anti-terrorism laws (which are really anti-privacy, anti-free speech and anti-dissent laws) are not just eroding freedom, they are making it more difficult to restore democracy when it will disappear. To think our current democracies are rock solid and could never, ever devolve into fascism is just arrogant and completely ignorant of history.

Anyway, we don’t need laws against things like “making terrorist threats”. We (in any country) already have applicable laws against threats of violence.