> Remember, even in Halo 3, their alliance was shaky at best. There was plenty of hate to go around between the Humans and Elites.
You are assuming that these attitudes were static and unchanging. At the beginning? Yeah, things were maybe like that. At the end? Well, I’m not sure it remained that way. Their relations were dynamic over the course of the game. You seem to be ignoring certain character arcs as well. (Such as Rtas himself becoming noticeably more comfortable in speaking with Humans throughout the course of the game.)
> During the meeting after glassing half of Africa thanks to the Flood, the Arbiter was the only thing stopping Half-Jaw from glassing the whole planet.
I think that was to emphasize the threat of a single flood spore surviving and how lucky Earth was in that it did not need to be totally glassed in order to prevent them from surviving. Hood was underestimating the Flood threat and implying that Rtas went overboard in glassing Africa, which Rtas didn’t like, thus he stated what should have been called for to stop the Flood; what he would have done in any other circumstance. Humanity just happened to be in the wrong place at the wrong time.
> Well, compared to the entire Sengheili population, it is a little stretched. I’m sure there are some who admire the humans in some way who are afraid to admit it because it would look weak.
A small minority would not warrant the extinction of their race, yet Truth ordered it and in doing so pretty much lost himself the war. He did it because the Elites were far from containing a minority in some respects.
> Leaving the Elites to scour Earth in search of a Holy Forerunner relic, and ultimately to uncover the most precious and sacrosanct Forerunner artifact in existence - the very portal that opened upon the Ark itself - would have placed all Truth’s aspirations upon the shoulders of a species he had already decided to cast aside, <mark>a species splintered by heresy and derision, even amongst their own ranks</mark>.
>
> Truth’s divisive mandate had been set in motion. <mark>The Elites had exhausted their usefulness to him</mark>, they would not be allowed to meddle in his affairs any longer, and he would not place his rightful transcendence into the hands of incompetents. His word was law.
Despite what recent additions to the canon would like to make out, Bungie made it patently clear what was going on with the Elites. The Elites were in the process of a major social change, and Truth viewed it as so much of a threat that he decided to have them all killed. 343i don’t appear to be following any of it for some reason though.