[At this, Walter shifts, a little more at rest, a little more relaxed. He sighs, gesturing with an open palm in recollection.]

He's thrown around wild theories right and left.

But it all ultimately boils down to one thing. The man who presumably killed his father, the man who is the villain in the story he's expected to be a good boy and play the hero role for, is also the man who saved him. He's being commanded to kill his own personal hero.