It appears the government ALLOWS people to have Constitutional rights UNLESS the government thinks otherwise.
Another example was the door to door warrantless searches of homes after the Boston bombing. Because the police decided there was a reason to disregard the US Constitution's Bill Of Rights, they did so.
Basically, to be accurate, the Bill Of Rights should have "Unless anyone in government decides otherwise,..."
OH... and for all the people who curse the federal government being too powerful, wanting "states rights" instead for freedom's sake, MOST summary termination of civil rights is by local and state government (local government is an arm of state government), not the federal government. The summary house-confinement of nearly 700,000 people in Baltimore was by the local mayor, not Washington DC.