Oh God here we go with the paradox of tolerance propaganda that you'll use to claim we should kill every Christian & their kids, and their dogs too. Maybe you should read more than Popper, or even some of his later work & stop treating everything like a handbook used by Zionist to justify their aggression & genocide. There are plenty of great philosophers that also challenged his work. I really don't know what to say except that killing people that disagree with you is what fascists do as well, and speech isn't killing you. People prefer good ideas over bad ones, and so if you have better ideas then offer those up. You will win people over by not turning violent.

"Hate begets hate; violence begets violence; toughness begets a greater toughness. We must meet the forces of hate with the power of love... Our aim must never be to defeat or humiliate the white man, but to win his friendship and understanding.

The ultimate weakness of violence is that it is a descending spiral begetting the very thing it seeks to destroy, instead of diminishing evil, it multiplies it. Through violence you may murder the liar, but you cannot murder the lie, nor establish the truth. Through violence you may murder the hater, but you do not murder hate. In fact, violence merely increases hate. Returning violence for violence multiplies violence, adding deeper darkness to a night already devoid of stars. Darkness cannot drive out darkness; only light can do that. Hate cannot drive out hate; only love can do that."

— MLK Jr.