No, that's another construct. It contradicts the essential nature of folk music. There was no "battle" in the 1880s (AFAIK). And the "vituperative intolerance" seems if any to come from those who insist (against all reason) that what they do is "folk music" and that any attempt to give sensible meaning to the expression is to exclude them. From what? A pool of penury? It makes no sense.