That's what I have always thought. He is so dedicated to the preservation of his timeline (and if you ask around at the Caverns of Time you'll hear about how ANY meddling, even just a wizard having a laugh, will be rooted out and prevented/undone), as are the rest of his flight, he knows how he's going to die. He's knows that it'll incorporate any attempts of prevention he makes.
So what I think is that he forsaw that eventually he'd create the Infinite Dragonflight, and that he'd then get killed by us. But it wouldn't be the "ZOMG let's go CRAAAZY ROFLCOPTER!" cliche people are worried about becoming prevalent. He'd be completely sane. He creates it, because he knows that's what will happen. He sends Infinites back (Or even forward, he could have been orchestrating this for millenia) to try and alter the timeline (knowing they'll fail), because he knew that's how it'd be. He'd fight us willingly in the final confrontation, because it was always meant to happen that way. He'd kill me without a flinch when I pull aggro, because he always knew that he'd do it.

You cannot surprise him. He cannot go insane. He is physically incapable of it. If he were to wipe out all life on Azeroth, he'd be doing his duty, because that's how it was going to be. His plans can't fail, because he knows what will happen. It's actually a little sad, because he doesn't really have any free will, other than to preserve the timeline.