Not quite. It specifically references those declared by the government to be fighting on behalf of those organizations.
We have courts to decide if such declarations of guilt have any basis in fact.
The courts do not work on real battlefields during a firefight. But even the German saboteurs on US soil during WW2 got at least a military trial in fairly quick order.
Is there anyone here who does not believe that there is a contingent within the present Administration that would gladly, eagerly and with a feeling of moral justification wishes to declare that members of the ‘Tea Party’ or even ‘Freepers’ are fighting against the lawful government and would gladly if not have us detained at least have us visited in our homes and given a frank attitude adjustment back by the threat of detention?
Yes the court could over turn such a thing, but how long would you be in detetion before you would get release? Hell how long would it take legal representitives to even find you? And even then what are the chances that you might have an accident while in custody?