Reading a book on three British perspectives on capitalism from the 20th century, this from 1913 is still good advice:
Unity is to be desired in all those matters which involve the everyday life of mankind, not in the sense that all must believe the same things or act in the same way, but in the sense that one man must not suppose that what another believes is dictated solely by selfish interests.
While disapproving of his actions he may be able to see that it has a moral justification.
