You're all wrong about the Defense Authorization Act

I just needed a provocative title

Why are we up in arms about it considering the inclusion of this clause?

(b) Applicability to United States Citizens and Lawful Resident Aliens- (1) UNITED STATES CITIZENS- The requirement to detain a person in military custody under this section does not extend to citizens of the United States. (2) LAWFUL RESIDENT ALIENS- The requirement to detain a person in military custody under this section does not extend to a lawful resident alien of the United States on the basis of conduct taking place within the United States, except to the extent permitted by the Constitution of the United States.

Could it be because anyone would technically be capable of being considered a terrorist?