How Do Christians Justify 'Following a Shepherd who was Actually another Lamb?'

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Christians praise Lord Jesus as 'the Good Shepherd' and in the next- (if not the very same)-sentence praise him as 'the Sacrificial Lamb!' So how do we know when to stop 'following Him'? Does that mean He becomes a [i]Bad]/i] shepherd? http://newmilleniumgod.blogspot.com/ (Reminds me of The Dark Knight or The Dark Knight Rises: "Either you die a hero, or you live long enough to become the villain.") I would 'justify it' by modifying the Christians' view of "God": rather than 'some supernatural Daddy sending down His son to explain how to behave before He returns to the clouds to ... take credit for whatever humans can't control, God is 'the force (hunger, love, jealousy, etc.) that leads humans to do what's best' or something. Does that sound right? Or is there a better interpretation? (And what's the best way to teach more Christians the better way?)