ABC chair Ita Buttrose calls racist treatment of Q+A host Stan Grant 'abhorrent'

Ita Buttrose said she believed people should be able to disagree with each other without being the target of online abuse. (Supplied: James Alcock)

ABC chair Ita Buttrose says Australians need to reflect upon their "abhorrent" and "unacceptable" behaviour on social media, following the treatment of high-profile Indigenous journalist Stan Grant.

Grant last week announced he would be stepping away from his media commitments.