Are you aware that the Constitution actually applies to everyone? Foreigners in our Nation can speak out, own firearms, etc, all the way through the Bill of Rights. You cannot possibly believe that the Founding Principles are only for US citizens? That document is one of the Lights of the World.
Has it occurred to you that these interrogations were of belligerent foreigners captured on the battlefield and took place in Guantanamo?
Hardly the same thing.
But it is only the law within the United States and some places under its jurisdiction.