actually if you read the General Theory you'll find he supported every kind of intervention including controlling long term rates. Sorry!
actually capitalism is, generally speaking, an economic system distinguished by largely voluntary transactions, but there is a huge role for government: police, money, neighboorhood effects, bankruptcy courts etc
Your claim was that he supported all of that all of the time, which is incorrect.
as I said if you read the General Theory you'll find that Keynes was a meglomanic monster who felt he had the genius to fine tune an economy using all the dials available, and then some. No one can say what he would have supported in any particular situation since it would have depended on his analysis of that specific situation which, owing to his vastly superior IQ, would have been beyond comprehension ot the rest of us. Thats is why you didn't say what Keynes would have supported now.
Largely voluntary transactions? Meaning there is at least some amount of involuntary transactions?
sure, government enforces capitalist rules all the time: police, zoning money courts, pollution etc etc
Your definition of capitalism is extremely flawed.
its Friedmans definition and he is considered the greatest economist on the subject in human history and so the greatest definer of what it means! Who could possibly be more qualified??