I have to agree with that, you can't end a war with a pretty speech, and you certainly can't end it with just one person/being agreeing. The fact that the Doctor supposedly has had to do this numerous times before is proof of that. This episode actually may hit a little more home now, unfortunately, with what just happened in France. No pretty speeches are going to end this.... I'm sorry for all the victims of this heinous act, and their families.

As for sympathizing with terrorists, sorry, no can do. Even this story did bring that out in the Doctor's questions. What did they want? War. What do they intend to do once they've won the war, what kind of state/country/world will they build? They don't want that, just war, possibly making everyone exactly like them (no choice for them in the matter). How can one possibly sympathize with that?

Right, I agree about Osgood, though. She has become a strong character with her own agenda now, other than being a Doctor fangirl (and the tables are turned, it seems; she has a fan in the Doctor).