Earlier quoted context omitted.
why do you think that "good" science is dependent on having democracy? is there a reference study to support this notion?
I don't think one needs a specific study for such a broad question. Science has historically based on a system of open debate. From Galileo onward, the ability of a scientist to engage in experiments which put commonly believed ideas into question has been one of the foundations of scientific progress. Both the NAZIs and the regime of Joseph Stalin had a history of supporting well-connected frauds to the detriment of…
Can you expand some details about that in the nazi regime ? but leave aside that nasty stuff with eugenics(which wasn't really a science) and focus on the hard sciences ?