To make sense of this complex world we create simplified narratives for ourselves, whether through movies or daily new broadcasts, whatever. Its easier to think in terms of good guys vs bad guys but in reality there are no good guys and bad guys. As the article says "Nobody thinks they’re doing evil". Ones freedom fighter is another ones terrorist.
We're pretty much all capable of being charitable/thoughtful while at the same time regurgitate a false narrative to advance our political opinions/careers or perform self serving interests or even criminal behaviour.
Humans self righteous beings.