蜜芽传媒

A film director has said the words of the Norwegian terrorist who killed 77 people in 2011 have become "mainstream" and "should trouble us".

Paul Greengrass has made a movie about the terror attack called 22 July - the date of the killings.

He says by listening and challenging extremist worldviews, such ideologies can be "vanquished".

(Image: 22 July film, credit: Netflix)