"I would just point out that Mr Carroll's experience would not have happened but for Bob Davenport."
Yes it would - I came into the revival about the same time as Bob and was influenced by people he was influenced by.
I find Bob's contribution to folk song somewhat chequered, to say the least and have always been at odds with his attitude of "art with a small "A" and culture "not being for the working classes".
Whatever enjoyment I may or may not have got from him as a performer, his input into my understanding of the music is virtually non-existent, if for no other reason than his disturbing habit of shouting down those he doesn't agree with.
I'm actually working on digitising a couple of hundred tapes of the Critics Group meetings at the moment - the group came into being when Bob, and several other prominent figures on the folk scene approached MacColl and asked him to give them singing lessons - the clubs were well up and running at the time.   
"it appears to me that you are prejudiced against Bob Davenport,"
I reported exactly the incident at the M.T. club -nothing prejudiced in that, and perfectly in line with what you quoted him as saying.
Jim Carroll