Ken Burns is not at all stupid. He is the mastermind of an elaborate plot to completely discredit the Irish from their rightful place in history as the true inventors of jazz.
Burns is being aided and abetted in this project by the powers that be at such organizations as PBS and the McArthur Foundation. We know from past experience that these organizations exist primarily to discredit the Irish. It's well known, for example, that Austin City Limits was conceived as a showcase for Irish music, an idea that was vetoed because of the vendetta against the Irish being conducted by PBS.
And, for the record, I did not start that fire in Chicago. It was the little black boy that Mrs. O'Leary hired to milk me.