"who dutifully reply "World peace""
Sorry Mike - I did miss the point; not part of my refgular viewing I'm afraid; have I missed much?
"Whom should he quote in support of his arguments "
He can quote whoever he wishes as long as he doesn't opt out with his regular "don't blame the messenger" escape clause whenever the going gets tough.
As guest Jon has pointed out, if the 'experts' he is putting forward reflect his own views he should have the courage and honesty to say so and be prepared to defend them rather than hide behind them, as he constatly does.
Jim Carroll