No way.
Walt is no Hannibal Lecter, c'mon.
I think you're making the character more bidimensional than he is.
When he cries to Walter Jr., he clerly cares.
When he lets Jane dies, that clearly affects him.
When he goes to take Jesse back from that crack house, he's clearly moved.
What Walt does, is he lies to himself, he can hide things inside so well, that they're lost forever.
That's what he does with the plane crash, that's what he does with his constant mantra "i have to ____ for my family" and so on and so on.
even Gilligan said that he and his writers, refer to Walter's super power as the ability to lie (to others and himself).
He's the ultimate delusional, but he is no sociopath.
Only in the latest seasons (4 nd 5) i can see his detachment from reality becoming a real sense of emotional detachment (him whistling when the kid dies) but i still read that as him living, at that point, on a completely other planet.