It's the first line in the article:

but said that U.S. courts lack jurisdiction to order his return from the megaprison where he’s now locked up.

The point is if they disappear people quickly enough, they think this argument will fly.

Cruelty is the point. Cruelty is what the American people want.

The American people are not victims of a dictatorship, they voted for this.

Because it's fun.

I'm not joking. This is the real answer.