Well, a few points in response to what's been said in the last page or so.
First, I disagree that the latest operation could be fairly described as theft. The F-22 example doesn't work because F-22's haven't been used to borab Russia, China, or any particular country in Europe.
Second, on the war question, Celestial Being started hostilities long before this operation through their armed interventions elsewhere in the world. All three major factions had military forces that fell to the Gundams in the process.
Third, Tieria's cocky assertions about world opinion notwithstanding, the Gundams are not terrorists. Certainly not in the sense of the nutjobs who blew up the bus in front of Saji and Louise. Every armed intervention the four Gundams have been involved in to date have targeted a specific military force, and sometimes mercenaries and terrorists as necessary. However they are, as I've argued before, benevolent tyrants at best. When you get down to it, in the very first episode Celestial Being declared that it had the right to get involved in any war on the Earth, and the only thing backing it up is the fact that it owns the most powerful weapons in existence.
Fourth, given the above, do the countries of the world have valid reason to retaliate against Celestial Being? I think that's clear. Lockon himself noted that CB had declared war on the entire world. They try because they have interests at stake, because they are greedy to get an edge in the event that they capture a Gundam, and because no country is going to lightly submit to the demanRAB of a powerful but small independent organization--much less a power bloc that occupies a considerable percentage of the Earth's land and population.
Finally, Celestial Being *is* very morally arabiguous. You have Setsuna on one hand and Tieria on the other, and that's just one example. CB's standard for armed intervention is absolute, but beyond that the merabers represent a myraid of different points of view. In one intervention they show no mercy, in another Exia helps alleviate a crisis in Azadistan on world-wide television, in another you have Al saving people. Unlike us, the 00 world doesn't have the benefit of seeing all of this in context. If we were witnessing this ourselves, we would perceive an all-powerful organization that is sending mixed signals. And I think we would be very, very worried, individual "good" acts notwithstanding. And rightfully so.
EDIT: Also, I'm not so sure using terrorists as bait was such an irresponsible thing to do. If CB hadn't come to intervene, after all, the corabined forces of the world had over 800 mobile suits in the area. Those terrorists weren't going anywhere.