I learned a good deal about economics and about America from the author of the Reagan tax reforms - the great Jack Kemp. What gave Jack that incredible enthusiasm was his belief in the possibilities of free people in the power of free enterprise and strong communities to overcome poverty and despair. We need that same optimism right now.
Even if people do wrong we're social animals so what can we do about stopping them doing the same things in future? Saying people are 'bad' or 'evil' is just an unwillingness to engage an unwillingness to try to empathise. That sanctimonious attitude doesn't help anyone.