Publicity, fame and the prospect of money poisoned the atmosphere. When everybody in uniform is a hero to the masses, then certain highly glamorized units take on an almost superhuman aura. It's hard to resist the temptations of public adoration (Rob O'Neill et al). Healthy
esprit de corps morphs into unhealthy entitlement.
I think you'd also have to consider the effects of multiple combat deployments on
some people. Once the savage is loose he's hard to contain (Gallagher et al).
I also wonder if the drive to ramp-up special operations numbers after 9/11 occasionally allowed questionable individuals to slip through the vetting/training pipeline? (DeDolph et al).
Back when the public treated the military with disdain it gave incentive to keep one's mouth shut.