Trump & co. are clearly aiming for an all out war between executive and judicial branches, hoping for a win, thus allowing them to continue all sorts of illegal and anti-constitutional acts unhampered in future.
Gov't is hastily deporting people, against Supreme Court orders, and then trying to say they have no authority to bring them back, which is a joke, considering the clout that the US has against a third world country, one word from the White House would have Garcia on the very next plane back.
But (I believe) Bukele was explicity coached and encouraged by Trump & co. to say that he would not return Garcia.
Obviously, if the Supreme Court did not pass this stay order (at midnight or whenever), many more (innocent?) people would be on planes out of the US, and the same lame excuse would be made in future by the White House that they have no ability to bring them back, therefore, the fast reaction from the court was in direct reaction to the fast actions of the White House, clearly a warranted and necessary action!