Earthlings Are Born Free

Thor froze at Tony Stark's questioning. Although Loki had caused the deaths of some Earthlings on Earth, Thor had already escorted him back to Asgard and locked him in Asgard's prison. What else could be done? Although Asgard had not informed Earth unilaterally, that was because Earth was merely... merely... Asgard's subordinate territory. As a subordinate region ruled by Asgard, what did Asgard's handling of Loki's crimes have to do with Earth?