Peter's singing style was very different from the usual folk revival style of singing prevalent at the time. and many people found it challenging. I've often thought his recordings didn't quite do him justice, and people who'd only heard him on record may have decided they didn't like him without ever seeing him. Live, he was never less than electrifying.

He was also an uncompromising and sometimes difficult personality, which some people took against, failing to understand he was striving against the complacent mediocrity so often found in the folk world.

Then there was politics. Some on the Left objected to his political views (although I wonder how many were his actual opinions or were expressed simply to provoke a good argument). They never forgave him for his espousal and promotion of Kipling, who they saw (incorrectly, imo) as a racist imperialist.

It is immensely encouraging to see how he is now regarded (rightly) as a hero by the younger generation of singers, and tragic that he is not here to appreciate it.