Americans are so naive about the "turn on their motherland" part. It's not really a reply to you, I just remembered some american whom I met and he was treating us as kids, saying things as "alone you are weak but together you are strong!"

yes if you could magically organize 10_000 people they could overthrow anyone. But organizing is hard. Starting from a fact that they need some secure comminution channel, and the government fights VPN quite actively. How would you reach these potential people? You could do sort of broadcast a public message "if you don't like tsar let's take a walk tomorrow" but this signal would also be received by the police, so they can prepare. And we don't have the beautiful gun ownership culture of America.

And if you do something alone you just perish in prison.