There are a lot of Amentan countries. Vanda Nossëo representatives are dispatched to all of them. These Elves (two with black hair, one with silver) take a shuttle down from the lightleaper to a country called Calado, and radio ahead to request permission to land at a elegant modern spaceport.
"We'll never make demands. We'll sometimes arrest murderers if the murder is obviously instigated by our presence and the local government can't or won't enforce the law. Joining is voluntary, spaceport's voluntary, you can tell us all to go away and we will. But 'aliens came to Amenta, people got murdered over it, their murderers got off' doesn't ring to me as 'made everything unambiguously better'."
"Because three hundred worlds will scream in unison 'you're holding these innocent traumatized people prisoner to appease the assholes who've spent centuries systemically terrorizing them?' and file lawsuits which the courts will immediately uphold because it's not, in fact, legal to confine indefinitely for reasons of expedience people who haven't done anything wrong. Amenta could of course say they can't visit here, but we were told that it'd be devastating if we let them go about freely in the places that would be happy to have them."
"I don't want to do that. I may not understand what it is you think is wrong with them but that'd be a tragic way for this to go. But - it's also a tragic way for it to go if the entire universe is closed to them. And there appears to be literally no one in the universe who both agrees that the second thing is a tragedy enough to be credible to us in proposing solutions and believes in pollution enough to be credible to you in proposing solutions."