Chestnut
Riverwalk interesting that you consider Rolf Harris and Hitler are not artists therefore we can destroy their art. Some people may not agree with you, they may consider it worth keeping for posterity. That is what the debate is all about. They are both in the programme.
For me 'Art' and 'Artist' are the crucial words.
Hitler wasn't a renowned artist so I don't think that destroying his paintings is a bad thing - I wouldn't actively promote it, just don't have a problem. From what I've seen of his paintings they're mawkish sentimental pictures of village life, landscapes, etc - if they were childhood drawings and scribbles they might be worth analysing to maybe gain an insight into his thoughts, which could be an interesting exercise.
However, if written war plans, diaries, memoirs etc were miraculously discovered then they would be kept for posterity, as they'd be relevant to his existence.