Popper was specifically concerned by those who refuse to engage in rational argument, instead using intimidation to respond to criticism of their ideas. When he talked about intolerance, he was referring to one kind in particular: idea supremacy. Popper believed that liberal societies have to be intolerant when people impede the workings of the marketplace of ideas. Not only is SJF idea supremacy not justified by Popper’s Paradox, it is exactly what Popper was warning about.
