At some point they really need to just sit down and chat outside of their Gundams. It could help to understand the worlds that they're both coming from, really. Kira can't help but see what he perceives as Setsuna's insistence on forging a world HE believes in through force to be pretty similar to Durandal's Destiny Plan; i.e. forcing a singular vision on everyone.
Re: Kira Yamato