NDAA signed by obama. Government can now detain US citizens indefinitely

Basically you can now be held indefinitely without trial. I mean, I don't live in the USA but this is absurd. The land of the free has become the land of the "do what we tell you or be detained".

The consensus appears top be that the NDAA doesn't grant the President any power he didn't already have by the AUMF, and other authroizations. What the bill does is says flat out that it isn't rescinding said powers. So, nothing new, even though we would wish that this would change.

(AUMF) already grants presidential authority for indefinite detention, the Act states that Congress "affirms" this authority and makes specific provisions as to the exercise of that authority.[11][12] The detention provisions of the Act have received critical attention by, among others, the American Civil Liberties Union (ACLU) and some media sources which are concerned about the scope of the President's authority, including contentions that those whom they claim may be held indefinitely could include U.S. citizens arrested on American soil, including arrests by members of the Armed Forces

How will anyone have the courage to go on stand against anything now in the US knowing that they can just without any evidence pull them up and send them anywhere in the world to a hold/prison indefinitely?

Unfortunately several current laws allow actions taken in secret and without any oversight, so even if it was used would anyone know?