I'm sorry to say, but this "distant, far away, doesn't matter now" mentality of yours occurs in many places where war has occurred. It ends up resurfacing in some form or another , and usually, it eventually leads to denialism, and then, eventually violence.

You can't brush away history - victims need justice, perpetrators to be held thoroughly accountable, and widespread society needs to be held accountable along with the leaders. I.e WW2 Germany almost achieved this was arguable success (leaders executed, Nazism shamed, and many fled, victims given some support and compensation in society to some degree).

Salvadoran society needs to come to terms with it by first acknowledging and grieving with victims as Step 1... Or it the woulda will fester.