If you are going to be interviewed throwing a hissy fit, it behooves you to get your dates right, and further not to give the impression that seemingly you don't understand why the law you are trumpeting was originally passed. The Posse Comitatus Act (the South's revenge) is not 150 years old (1865) rather it was a piece of political "log rolling" passed in 1878.
As to the National Defense Authorization Act for Fiscal Year 2012, yes it extended the definition of someone subject to detention to include "A person who was a part of or substantially supported al-Qaeda, the Taliban, or associated forces that are engaged in hostilities against the United States or its coalition partners, including any person who has committed a belligerent act or has directly supported such hostilities in aid of such enemy forces.
However, it also states "Nothing in this section shall be construed to affect existing law or authorities relating to the detention of United States citizens, lawful resident aliens of the United States, or any other persons who are captured or arrested in the United States."
All this within the first 30 seconds, when I decided I have better things to do.
