There's enough truly bad actors out there, not everything is shades of gray. Cartels, North Korea, ISIS, etc.
> relies on the perspective of the participant though > Parents point is that ‘bad’ is a matter of perspective, and that right or wrong,
Not really, though. Some things are just 'bad' (you or the perpetrator might not agree but that doesen't change that fact).
The problem with a "no shades of grey" stance is that in any large organised group there are going to be some good points and reasonable ideologies for why they have banded together to do what they do. They may be mistaken on important points, and it certainly may be necessary to put all empathy aside and try to ruthlessly crush them regardless of any good points they have - but in practice that approach almost always leads to terrible results compared to negotiating to emphasise the good and suppress the bad. Take ISIS - the reason we have groups like ISIS running around is generally because of a no-shades-of-grey approach taken to deal with their precursors. The US policy in the Middle East typically destabilises things (although they are hardly alone in doing that).
[0] https://en.wikipedia.org/wiki/Foreign_relations_of_North_Kor... - "Results of the 2017 BBC World Service poll. Views of North Korean Influence by country"