Regardless of self-determination, I think the NTF had to be stopped. Besides, they were attacking the GTVA in way of attacking the Vasudans and massacring Vasudan civilians, and trying to capture Polaris, which AFIAK was not predominately pre-NTF.
And, as much as I hate bush, his crime is fighting a war that may not be justified. In war civilians die, no matter how hard you try not to. By fighting this *possibly* unjustified war he let civilians be killed, however he's not ordering troops to go in and slaughter innocent civilians just because. Bosch did, though, just like Hitler, or the Japanese military dictatorship of WWII.