Actually, it was just a question about motivation, not really directed at you per se. What would it take for anyone one, but especially someone as smart as Zach, to be convinced to commit cold-blooded murder. What logical argument could you use to convince someone, who as far was we know has not criminal history at all, to do this thing. And to believe it's the right thing to do.

To me, it doesn't seem possible that Zach could be convinced to do it. Which is where the show fails and becomes ridiculous unbelievable.