The PBS response is reasonable - I guess I'd have to say they missed an opportunity to make a brave statement; ie letting Daniels speak his mind - and having a strong statement against the terrorist attacks on the US - BUT, it's their network, their show and I do understand, as a producer of show/s music, that one wishes to select the music that is performed.To be more specific; the worst I can fault PBS for is failure to make a stand. They think they made that stand elsewhere, and this show is not the place ... maybe so, that is their choice.
Do I think they are overly PC? Yes, as a rule. Do I think they are more so then other networks? They are worse then some, better then others.
While I am a PBS critic, at times - I am a PBS viewer. I almost watch no other TV (sports on Networks,occasionally but otherwise it's PBS). Do they lean to the left? Decidedly so.