Barton, who served two months in prison in 2008 after admitting assault and affray, criticised two of the Premier League’s most high-profile stars during a public speaking appearance yesterday in London.
Of Chelsea skipper Terry, who lost the England captaincy temporarily over claims he had an affair with his former team-mate Wayne Bridge’s ex-girlfriend, Barton said: “There was a human element then about, as a man, what you should do either to your friend at work or one of your colleagues. It shouldn’t have happened.”
Giggs was this year accused of having an extra-marital affair with his brother’s wife, and Barton added: “The Giggs issue in any walk of life is not right. The behaviour of the man towards another man, towards his brother, it’s not right, regardless of the player.”
The former Manchester City and Newcastle midfielder also added to criticism of England’s rugby players at the current World Cup in New Zealand. He said: “If that was an England football team at a World Cup, there would probably have been public executions.”