A former Foreign Minister says Winston Peters was right to fire Phil Goff. 

Goff made comments at a public event questioning US President Donald Trump's understanding of history. 

The remarks have cost him his job as High Commissioner to the UK. 

Foreign Affairs was one of a number of portfolios held by Sir Don McKinnon under National. 

He told Kerre Woodham it's unacceptable for a diplomat to say such things. 

McKinnon says there's a line that ambassadors and High Commissioners should not cross. 

LISTEN ABOVE 

See omnystudio.com/listener for privacy information.