I thought who launched first was a mystery. I know Richardson claims it was China, but he's not really a reliable and unbiased source, now is he?
Actually yes he is. If anyone can be trusted to give a reliable account of what occurred pre-war, its the remnants of the American Government and its leader.
Richardson also has absolutely no reason to lie to the Chosen One, after all he just outlined his plan for global genocide, I hardly think saying "yeah, we started it" is going to have any further detrimental effect on what the CO thinks of him. Certainly Richardson isn't worried about being killed either, since he is willing to make that sacrifice.
Richardson's statement is also backed up by the nature of what was going on at the time. It was China who was being backed into the proverbial corner, not the U.S. China had the motivation to launch as per a sort of "I'm not going down alone" approach, while the U.S. could only hurt itself further and at the same time ruin their chances for domination on the political map with the addition of China and Canada's resources.
But it's not capable of achieving sentience nor truly the leader but a statistical help.
Fair enough, but the Shi revere him as some sort of ceremonial figurehead in any case. While the Shi Emperor may not dictate orders (I forgot he isn't a ZAX) he is still the symbolic head of the Shi in some form. Even the "true" leadership of the Shi seem to be unwilling to take power publicly, which indicates some sort of nominal deference to the AI.
EDIT: Back on topic
I think what Marcus said about the Legion rings true with Ashur's army as well, the raiders in the Pitt are following Ashur and not his beliefs; they'll tear each other apart after he dies.
Ashur's full plan however, is to prevent that from happening. Marie is likely set to be Ashur's direct hereditary heir to the Pitt (Queen of the Pitt?) and if a cure is indeed found with Marie's help, he could undoubtedly use that to shore up Marie's legitimacy.
In any case, he wants to pacifiy the raiders tendency to fight amongst themselves and attempt to turn them into a more civilized bunch.