On April 10, the U.S. Supreme Court unanimously found Abrego Garcia's removal to El Salvador to be illegal. The court rejected the administration's defense that they had no jurisdiction over El Salvador to bring him back, with Justice Sotomayor noting that the argument implied the government "could deport and incarcerate any person, including U.S. citizens, without legal consequence, so long as it does so before a court can intervene." The administration has defended the deportation in the press by accusing Abrego Garcia of membership in the MS-13 gang, a U.S.-designated terrorist organization. No charges have been filed against Garcia.
You could read the wiki article in the first post and findd out that your highest court ruled 9-0 that it was illegal to deport him. There is literally no legal question about what happened.
Your post is simply wrong. That is the opposite of what the supreme court ruled. The supreme court explicitly ruled that the courts have no jurisdiction over foreign policy and cannot force the administration to effectuate the return of a person held by a foreign power, quashing the lower court order and holding only that the administration must facilitate a release and return from the limited scope of the American side. If El Salvador were to release the MS13 guy and return him on a flight to America, the court's order would compel the US to cooperate and return him all habeus corpus style. It cannot force El Salvador to do anything, nor order the president to force El Salvador to do anything.
As I said right at the start;
In this guy's case its a mistake since he had that oddball order barring his deportation to his home country despite being found a gang member. But its spilt milk, the government makes mistakes and it can't always correct them.
I could also be the next person hit by a police car during a high speed chase and a court order wouldn't be able to bring me back to life. Necromancy is beyond their jurisdiction, it belongs to bony men and god almighty
Just because the government has made a mistake does not mean it can necessarily rectify it, nor do courts necessarily have the power to do anything about it.
Of course the "mistake" in this case was failing to realize the courts had put in place an utterly insane order that no reasonable government official would expect to exist and so they had no reason to check.
He was deported to El Salvador in mistake despite the order prohibiting his deportation to El Salvador. Shit happens. The government and courts alike can recognize it as a mistake and against the rule of law, but that doesn't mean they have the power to grant any relief.
That's a pretty common theme in the judiciary: Just because something is illegal or wrong doesn't mean the court can remedy it.