(1) So I would be very careful to deem "opposition" activity as "foreign-funded terrorism".
(2) In every country, citizens need to have the right to be in disagreement with their governments.
What an interesting post because of the way stuff you say are completely unrelated and yet you seem to believe they are related to each other and to what I said; like these two sentences that sum everything up! Perhaps because you were never on the receiving end of it but "your side" has always been only on the supplying end.
So let me translate things for you using your own words and put the shoe on the other foot a little bit so that my initial comment becomes clearer and maybe you understand the real difference between "opposition" and "foreign-funded terrorism".
You said people have the right to be in disagreement with their government. I completely agree and I even go as far as saying they have the right to overthrow that whole system if they see fit (we did that 47 years ago when we replaced the US-backed dictatorship and established democracy).
Now lets take Germany. A large portion of Germans dislike the Supreme Chancellor Merz, and that hatred is increasing year by year as the economic situation worsens and he keeps funding Zionists helping them commit genocide. As I'm typing this thousands of them are protesting against the German regime in downtown Berlin.
Now imagine an alternate world where Russia has an organization called "De-Nazifying Foundation" that received donations in bitcoin to fund "opposition" groups in Germany to "protest" against Supreme Chancellor Merz because as you said yourself "there are currently no really good governments at all" and "citizens need to have the right to be in disagreement with their governments" and since Germany is considered highly authoritarian all of that makes perfect sense.
And lets say in that alternate world the group the "De-Nazifying Foundation" funds is called "Freedom Movement of Germany" and its motto is "Free and Democratic Germany". Some cases of their "opposition" is assassinating scientists and university professors, bombing hospitals, destroying bridges, espionage, ... and one of their most recent "protest acts" was to blow up a power plant that is currently keeping the lights on in your home letting you post here!
Here is a better one, you know NATO and Russia are close to clashing. So one of their next possible "opposition" acts in that hypothetical scenario would be to cooperate with Russians to bomb Germany more effectively, providing them with coordinates, infiltrating the military, leaking classified documents, carrying out swarm attacks against German force that defend against Russian invaders, and so on...
Now tell me what would you call this hypothetical "Freedom Movement of Germany"? "Opposition" or a "foreign-funded terrorist group"?