Can a bad man create good music?
Music, though, for some mysterious reason, is different. In music there are few instances of a great composer who was not, in some way, a good man. Misanthropes abound, but Beethoven, Brahms, Bruckner, Britten were decent to the core. Bach was a friendly teddy-bear for the most part. Mozart was much misunderstood. Sibelius was a moral rock hiding behind a vodka bottle.
Mahler once said - and I think he meant composers: 'there are no great men without some goodness'. Schoenberg said of Mahler: er war ein Heiliger - he was a saint.'
So why do composers tend to the good? You tell me.