Of course, there is a dark side to us.  We kill wantonly, don't we?  We burn people in the name of God.  We destroy ourselves, we obliterate life on this planet; we destroy the earth.  And then we dress in robes and the Lord speaks directly to us.  And what does the Lord tell us?  We shoul be good boys or he is going to punish us.  The Lord has been threatening us for centuries and it doesn't make any difference, not because we are bad, but because we are dumb.  Man has a dark side, yes, and it's called stupidity.