So... where'd you get that analysis? :) It's exactly right, by the way.
Christian (truthful) view of the nature of man - inherently sinful. Must not be allowed too much power over his fellow man. Only through a spiritual rebirth in Christ will someone choose a different path away from sin.
Secular Humanist worldview of man - perfectable, given the right societal environment. And that environment can be created by giving the "more perfected" people enough power to do so.
You are wrong on both counts.