> Feyerabend, an academic and leftist anarchist)

Yes that was obvious in your first post.

Feyerabend was writing during the cold war and was influenced by Marx (an authoritarian) and Marxist critiques of science promoted by the Soviets at the time. You get the same threads running through people like Kuhn and Popper.

The backdrop of these ideas is that the authoritarian Soviet state wanted to undermine faith in science within the US for the same reason it wanted to undermine democracy. They also wanted to promote the idea of alternative views of science at home because Soviet science was constrained by needing to be consistent with Marx. These ideas percolated for a few decades as propaganda before people like Feyerabend gussied them up and tried to publish them as academic works.