The $1 bond was paid. But for someone so eager to torch the American house, Khalil is oddly determined to keep a room in it. On Friday, the only door that opened was the one back to his cell. Mahmoud Khalil, Columbia’s most litigious Gaza sympathizer, had seemingly triumphed in federal court—only to find himself right back where he started. Down in Louisiana, where the alligators grow so mean. After days of breathless media coverage and a headline-generating injunction questioning the legality of Mahmoud Khalil’s detention, Judge Michael Farbiarz quietly reversed course. In a terse, two-page order, he declined to...