Number 1 is probably valid. It also could be seen as blackmail, unless the group in question is unfairly kept out of the market.
Number 2. The Author put 'freedom of the press' in quotation marks. I don't think we are discussing this with similar baseline assumptions and understandings. The author's line of thinking is alien to mine, or so it would seem.
Number 3. The Author failed to demonstrate why unarmed civilian peacekeeping is preferred to armed civilian peacekeeping. Others have suggested that the American civil rights movement benefited from the basic right of self defense.
Number 4. Should we sing kumbayaa?
Number 5. Why use Norway as an example? Who is an extremist in Norway outside of Anders Brevik? What great following does he have? His victims were going to do what, demand more immigration? What extreme end of the governing party would you counsel against? Unless of course your fear was that Anders Brevik's victims would turn to fundamental Islam...
Number 6 is laughable for reasons I needn't explain. He must live somewhere far away from where he has to interact with police, or, more optimistically, the police where he lives don't have unions or something approaching qualified immunity.
Number 7? I need some case studies here, but what on earth is he talking about other than Saudi Arabia (which invited us) or a whole bunch of peace keeping efforts, often as part of a coalition? Don't place troops where they'll upset folks... that seems a hard rule to follow. Should we insist on a parliamentary democracy before we employ troops? In what manner do we gain the approval of the populace? Rasmussen polls? Do we bomb the 40 percent of the population at the behest of the 60 percent majority? (see Kosovo) On what basis do we establish a country's government is legitimate?
Number 8 needs a whole number of caveats. Al Qaeda in the Magreb exists largely because of payouts from France, Germany, and Italy. Maybe it doesn't make sense to categorically say no to negotiations, but it doesn't seem to follow that one can safely negotiate the return of ones captive countrymen without promoting hostage taking.
Oh wait, he's a quaker. Nevermind.