What gets overlooked here is the US IC itself being a probable cause: the habit of "housecleaning" by killing individuals suspected to be possible (even only prospective) leaks of inconvenient information is very real.
The recent cluster of weird deaths and disappearances of scientists linked to secret military research has a similar pattern to it: a statistically highly unlikely density of "suicides, accidents & mishaps".
The assumption, those actions were "justified" somehow is entirely baseless: there is no transparency and no effective oversight. What is supposedly being kept secret there might simply be illegal corruption or embarrassing and inconvenient to those in power.
I think there are plenty of individual men who are absolutely responsible for things becoming worse, and we do the world no favours by helping them shrug the burden of their actions.