In the paradox of intolerance, Popper was writing about violence, not anti-establishment speech.
Known for his critical rationalism and vehement opposition to authoritarianism, Popper would probably be spinning in his grave if he knew that his essay is cited as a token every time someone is persecuted for posting the wrong kind of tweet.
It must be tricky since I don't think you understood Popper at all.
Popper was completely in favor of free speech, and a completely open society, with no censorship except in the cases of actual violence:
"he is known for his vigorous defence of liberal democracy and the principles of social criticism that he believed made a flourishing open society possible" [1]
It’s indeed tricky, but the sorting criteria is: once in power, would these people club me to death, or let go of power if they lost a free election?