In regard to Abby's note. You are quite correct about Miranda and her refugee status. As to your thoughts on Josef, that is open for speculation I would suppose.
I think when you hear the documentary many things will be explained by the participants. It is true, however, that they were not of the political activism on stage that some others, say Pete Seeger, Phil Ochs (later) were.
Tune in and, hopefully, some of the questions will be answered. Also you will get to know them on a more personal basis.