An unctuously superior tone on the basis of very imperfect understanding

I did not realize how conservative a cast of mind had T.S. Eliot. Here he is on friend Stephen Spender as quoted in Liberalism: The Life of an Idea by Edmund Fawcett.

He is a liberal and therefore tends to intolerance and judging others and he tends to take an unctuously superior tone on the basis of very imperfect understanding.