They killed a lot of people! And should understand that this was wrong and the oath was wrong and the rebellion against the Valar was wrong and okay they were expecting to have to compromise on that last bit.

Yes, that would be a place they might need to compromise. But like, why is this Mandos's hobby, is he just fond of seeing what creative implements they come up with or what.

He's supposed to help everyone. So even if they refuse help he has to keep offering occasionally.

"Help" meaning.

Talk with them until they are ready to be reembodied!

Weren't they not planning to reembody them.

Because they were not looking very repentant. If they'd repented they could have been reembodied.

Is there by any chance a "mindfuckery" step in there that they're eliding over, she has heard that this happens when people get reembodied in the conventional assembly line, the Bells complain about it.

They were confused about incarnates. They thought incarnates were like them; they can't do anything unless it's inherent to their character, so if they murdered people, the murdering-people would have to be altered for them to repent of it. Elspeth explained incarnates and now they know this not to be the case.

Okay, but, before, when they solicited repentance, coughing up actual repentance would have led to mindfuckery.

True. They should ask again and explain how they know better now.

They do that. They are told to go fuck themselves with the rusty sawblade of a carpentry shop now buried deep beneath the sea.

Y'know Elspeth can talk to Mandosed people. She just can't hear what they're saying back. She might be more, uh, credible.

If she wants to tell them that the Valar now understand stuff she can do that.

Hi dead Fëanorians this is who she is and what she is doing here and how far along she has gotten on the project and while the peal can kind of just steal them from Mandos they prefer not to do that by default and this is a particularly unappealing case in which to do it because favoritism-by-alt only extends so far, is there any give on the being sorry you killed people thing?

...they deeply regret killing any humans who got in the way, humans don't come back. Admittedly everyone was going to die anyway because the war had been lost but, like, still, some humans died forever a little sooner than they would have and not much more cleanly, that's pretty awful.

...they regret that the people who trusted and followed them are suffering for their mistakes. 

...they regret that any dead person ever had to go through Mandos, he's horrible and they dealt with Morgoth for six centuries.

Everyone could really have just given the fucking Silmaril back. They begged. They are not very natural to begging and they begged, and they would have done anything at all, and those people chose this over literally any price they could have demanded for the Silmarils so if those people do not feel like they made a good choice, uh, agreed, they did not.

Elu fucking Thingol had it coming.

Oh the humans can come back now Gem fixed it but yeah that's still a strong candidate for regret! And yeah Mandos is not super popular multiversally. And people should totally have just given the fucking Silmaril back, like, wow, that's impressive amounts of dumb on several people's parts, but it's not those people Elspeth is trying to get paroled for mass murder, so, not super topical. Elspeth's not super a fan of Elu fucking Thingol either, though she's only met the evil one she hears the other ones are less overshadowed by Melian and do shitty things like ambiguously try to make people murder Gem.

They're glad to hear humans can come back now. If 'we regret that anyone ever spent any time in Mandos' doesn't cover it she's kind of out of luck, they don't regret the people they sent to Mandos more than all the people they failed to save from Mandos by just winning the war, or more than all the people whose suffering in Mandos had nothing to do with them.

Well, it's not her they have to convince. Valar?

The Valar do not think these sound like super repentant mass murderers.

Were they expecting mass murderers who consider mass murder bad for reasons other than the results of mass murder, i.e. people being various sorts of dead?

...they could take more personal responsibility?

The concept honestly seems kinda dumb what with the whole "it's a fucking Arda" underlying conceit but maybe the Valar had something different in mind?

Okay, they can't, but it would still be virtuous for them to have done so.

You're kinda moving the goalposts here, Valar.

...off-planet? Never to be seen or heard from again?