Bought that for a while, that he was working for himself. At the end, though...

[When Saren had tried to kill himself, before Garrus had gone down to make sure the job was done, they'd had a glimpse of something else.]

He'd been indoctrinated for a long time, Shepard. Maybe a part of him really did think he was saving a portion of the turian people with his cooperation. And he would have taken out the galaxy to do so. Is this really that much different? Saving my homeworld, saving yours, taking away a whole lot of others in the process?