Along with this comes a modern judicial system that doesn’t go out on witch hunts looking for scapegoats but a judicial system that realizes the only way to fix problems like this that do occur is to encourage people to come forward to tell their side of the story without punishment.
Let's not use this case generically. I really don't like the way you put this specific thing.
Probably both controllers and pilots should not be prosecuted in the GOL/Legacy collision case but pushing for a generic immunity in any circumstance is very irresponsible IMHO and doesn't happen anywhere in this world.
As to the rest of your statement you are completely right: We should not cover up the problems with our ATC.
Nor should americans cover up the problem of pilots unfamiliar to a given A/C flying without sufficient training and putting the lives not only of Brazilians but of US citizens in danger too, no matter the eventual lack of correlation with the accident itself.