In a cryptic footnote here (pdf, via), Paul Samuelson refers to Keynes’ anti-Semitism. Rather ignorantly, I was unaware of this. A quick look further shocked me. Nina Paulovicova quotes him thus (pdf):
Even Keynes’ admirers (such as Skidelsky and Moggridge) agree that Keynes was anti-semitic - though in his favour it doesn’t seem to have stopped him supporting Jewish refugees or even Zionism.
And of course, his view of Jews is irrelevant in assessing the relevance of Keynesian economics today; we should avoid the “poisoning the well“ fallacy.
But even so, doesn’t this attitude show that some people should be more careful who they choose as intellectual heroes?
* It's surely not good enough to defend Keynes by claiming (rightly) that anti-semitism was common at the time, given that Keynes spent so much of his life rejecting what he regarded as conventional attitudes and beliefs.