It's certainly perfectly legal. But I just think it's problematic. The Dalish squat because they don't have any home to call their own, and even if the fall of the Dales is entirely the Dalish's fault, it's the fault of their ancestors 700 years ago.
They do, though. They aren't appealing options, but they do exist: there are still ungoverned and uncontrolled territories in Thedas far from national control (the Ferelden South is an example), while the alienages is also home to as many or more elves than the Dalish. And Dalish certainly can immigrate to them, even if they quite understandbly don't want to.
The Dalish have bad options, but they do have options. They don't need to maintain their current conduct in the established nations.
The only solution we're offering here is that we should take them all prisoner, quash their culture and demand they submit to humans. It's certainly not my idea of justice.
Not quite. Ianamus is offering them to give up their mages. Most others would be content if they did not maintain racist practices and casually murder or avenge themselves on innocent humans.
The first is contentious, but the second is pretty reasonable.
And again, I don't think you can use Ishmael as a point about why the Dalish are so incredibly dangerous. Tahrone was almost undoubtedly trained by the circle, and she set Xebeneck loose on Kirkwall. A bunch of random adventurers screwed with Gaxkang. These demons want to be unleashed on the world, and they're perfectly happy to manipulate any mortal, Dalish, Andrastian, Tevinter, whatever.
Sure. And in Andrastian lands, they have set up institutions to try and prevent and mitigate the threat. They don't want it in their lands, and they try and prevent it.
The Dalish have no institutions beyond Keeper Knows Best, and the Keepers have been the most involved with magical abuses against the Humans. They don't want it to affect them, but they've demonstrated precious little concern about the impacts on the humans in the lands they do it in.