A federal judge in Washington, D.C., on Friday, took the Trump administration to task over its use of an 18th-century wartime power to summarily deport more than 100 alleged Venezuelan gang members to a notorious prison in El Salvador without due process. The case quickly became a legal tinderbox, beginning when the administration allegedly ignored a court order directing it to have two planes full of migrants immediately returned to the country.

U.S. District Judge James Boasberg wasted no time in calling out Deputy Assistant Attorney General Drew Ensign over the Justice Department’s conduct in connection with the case, particularly highlighting the tone and tenor the government has employed in recent court filings.

The judge said the filings contained “the kind of intemperate and disrespectful language that I am not used to hearing from the United States.”

Boasberg also repeatedly indicated that he was skeptical that President Donald Trump’s invocation of the Alien Enemies Act of 1798 could be used during peacetime and against a nebulously defined “enemy” — in this case the Venezuelan gang Tran de Aragua (TdA) — as opposed to a foreign government.

The judge appeared even more concerned that those detained and deported under the statute seemingly have no way to challenge being detained and shipped off to another country’s prison.

“I agree the policy ramifications of this are incredibly troublesome and problematic and concerning,” Boasberg said. “I agree it’s an unprecedented and expanded use of an act that has only been used in the War of 1812, World War I and World War II, when there was no question there was a declaration of war and who the enemy was.”