Pete Seeger is kind of getting up there, isn't he?

Yeah, he's in his nineties, was one of those Roosevelt communists and is backing that tired and continuing boycott of all things Israel.

Sure Pete, be my guest but don't bow to pressure and keep your principles where they matter most, AND just to remind you of what to be sure you don't want to use- for purity of your ideas and all...
Here's a list.