"Let me take the liberty of being uncharitable but truthful.Rothbard had a problem. He thought he was a great economist, but practically nobody within the profession agreed and most of them had never heard of him. Rothbard had a solution. He was ignored because he held extreme pro-market views, which were ideologically unpopular in the academy. Rothbard had a problem. Milton Friedman held extreme pro-market views--not as extreme as Rothbard's, but far enough from academic orthodoxy so that the same effect should have existed. But Milton Friedman not only wasn't ignored, he was viewed within the profession as a leading figure--despite his unpopular political views. Rothbard had a solution--to persuade himself and his followers that Milton Friedman was really one of them instead of one of us, hence his acceptance by the profession didn't contradict Rothbard's view of the reason for Rothbard's non-acceptance.Maintaining that claim was difficult--at one point I remember being told by a Rothbard supporter, explaining why he was not going to publish a letter of mine in his journal that contained quotes from my father inconsistent with Rothbard's account of my father's views, that if Rothbard and Friedman disagreed about what Friedman's views were, Rothbard was right."
January 1, 1970
https://en.wikiquote.org/wiki/Murray_Rothbard