I also think the social, political situation now is considerably changed from the time when Popper's book was written. Therefore, new problems, which Popper did not expect at that time, have been produced. I think that Takeuchi wanted to explain it. It seems to me that it is unimportant whether criticism is friendly or hostile. For me learning is important.
Popper aims at winning the debate.
I think that in discussions it is unimportant to win or to lose. Their conversation is regrettable. Kamino defends Popper's critical rationalism. Kamino pointed out that Bartley's questioning of Popper's critical rationalism is right but his solution is refuted by Watkins and Post. He tried to defend Popper's critical rationalism by his way which I could not understand.