Thanks for the information. Didn't realise the above-the-line/below-the-line split, so I will observe it in future. Apologies.

Pete Seeger a communist? Lummy, which he had been!

And as regards protest songs which were wrong when they were penned and sung, the answer is no, we shouldn't sing them any more, except as curios from a different age. A bit like uprooting statues and moving them to museums, where they can be labelled 'this is the sort of man (usually a man) who did this, this and this, and was once revered; now we remember him in order not to make the same mistakes again.

Thanks for the 'Seeger' additional words to 'This land'. Good to know that others had similar reservations!