He had a cheek
The guy was the typical Irish pisshead yet insulted Brando. How a second rate actor like Harris can insult the best actor in history is beyond me, especially since Harris completely RIPPED OFF Brando in his performance in "This Sporting Life". I think Harris had a life long seething jealousy that Brando had starring role in The Mutiny on the Bounty and not him.
Harris had not class. Brando seldom slagged off fellow actors.