"But I think what she's talking about is exactly what I've done; which is didn't intend to offend anyone, didn't think there was anything wrong with it, but clearly some people take offence at it.
"And that's probably a good description of what casual racism is. Dame Susan's comments have helped me to understand."
Boag's latest comments comes after she referred to Bridger as being "barely coffee-coloured".
Although she would not go as far to apologise, she said she never intended to offend anyone.
"It's not intentional - but sometimes you don't realise and appreciate sensitivity.
"I now understand what casual racism is and how easy it is to engage in it without intending to offend anyone."
Meanwhile, Race Relations Commissioner Dame Susan Devoy has urged Sir Peter to meet with Bridger and "make it right". She said he knew how to do the right thing but might need a bit of encouragement.
Dame Susan was speaking after attending the funeral service at Manukau Memorial Gardens in Auckland of the trio who died in the December 22 Flat Bush fire.
"He made a racist and offensive comment but he's not an offensive person," Dame Susan said of Sir Peter.
"Truth and reconciliation is a part of who we are and sometimes we muck up."
Devoy believed Sir Peter was a good person and it wouldn't be fair for one thing to cast a shadow over his whole life.