I guess they could use the Patriot Act, E.O. 13033, military tribunals, and "executive privileges" claimed by the current administration as working models for implementation of such 'citizen empowerment.'
Speaking specifically to the three temporary government policies you cite, if those were American policies in peacetime, then I'd agree with you that they are not shining examples of ways to treat your citizens and your country's guests. HOWEVER, it is not bright to suggest that civil liberties should be strictly maintained when a nation's way of life is on the line. Thinking long term and assuming that there is an interest in maintaining our country's strength, it makes sense to give up liberties in the short term if it means an increased ability to maintain them over a longer term.
So if the results of these tribunals and increased DOJ power is that our country emerges stronger than it otherwise would have, and therefore better able to defend and possibly spread liberty in the future, then the right decisions have been made. Assuming, of course, that the "stolen" liberties return in peacetime.