Suspending the writ of habeas corpus would take Trump’s efforts even farther – allowing the government to detain migrants without giving them the opportunity to challenge that detention, essentially letting the administration detain people without providing justification.

Also:

With the reinterpretation of “protective custody” (Schutzhaft) in 1933, police power became independent of judicial controls. In Nazi terminology, protective custody meant the arrest—without judicial review—of real and potential opponents of the regime. “Protective custody” prisoners were not confined within the normal prison system but in concentration camps under the exclusive authority of the SS

Just saying.