Poor thinking does not necessarily reveal itself immediately as such. The fact is that even thinking of the most absurd kind may prove successful for a time, if it caters to the egocentrism and prejudices of people and fits into an established logic of power. We can see this clearly in a historical context if we examine some of the Facist thinking which, though deeply flawed, was accepted by highly intelligent people, including leaders of German industry, in the 1930's and 40's.
Winston Churchill (1948) summarizes the thinking of Adolf Hitler in Mein Kampf: