The title asks "are all folk musicians political" musicians is the key word here ~ musicians I assume perhaps should be singers [maybe we should start again lol]

I think folk song is the important distinction ~ singers convey largely the malcontent that they themselves have suffered or empathise with having seen ~ this may or may not have political repercussions or indeed may be the result of political decisions made

All points of view are raised in songs which you may or may not agree with ~ the politics by and large tends to be from workers leftist angle

Ray