God can be anything that believers want him to be or believe that he is. You apparently believe that God is a pleasant fellow who is rational, merciful and loving. I myself do not believe that there is an actual God who has any bad traits but just beliefs in a God with an unfortunate character.
I am afraid that since man first created God, and described him biblically, he has been portrayed and thought of as cruel, vindictive and irrational. The fact that I am incessantly reminded that I will be spending a rather unpleasant eternity is testimony to the common perception of a cruel, irrational and vindictive God.
Unfortunately, two thousand years of the generally accepted Christian God makes a strong case that, "Belief in a cruel God makes a cruel man."