Triplane - the OP piece is just a link to a piece of RTe political propaganda ,which has given GSS the chance to come in with a bit of fun on a mudcat music thread. It really has very little to do with an appreciation of either jazz or Irish traditional music - it has about as much to do with music as the chair does in a game of musical chairs. So to join in the fun and games:
The Blueshirts , Blackshirts, Brownshirts etc were all part of the same extreme right-wing thirties phenomenon. The ideological sons and daughters of that breed of fascists hate the Divil Leary because he didn't get along with the Blueshirts and banned them from marching .