He shied away from those who had adopted any ideology that blinded them to either mathematical fact or real events.

From John von Neumann: The Scientific Genius Who Pioneered the Modern Computer, Game Theory, Nuclear Deterrence, and Much More by Norman Macrae.

These colloquia often ranged also over political debates, and Johnny’s technique in these proved the same as later in America. He never argued with people who said anything emotional or politically convinced. He did not believe that public argument changed such people’s views, and he thought preaching back at them simply brought boredom and bad blood. But he asked probing questions of anybody who said anything interesting, and “interest” was a word to which he gave a wide range. Johnny preferred people who laughed at the world rather than whined at it. He shied away from those who had adopted any ideology that blinded them to either mathematical fact or real events.

Well that takes away 75% of the national discourse conducted on Twitter, in the mainstream media and in academia.