The thing I think people object to fr0d0, is that we've seen this kind of argument before, but from worldly sources. The German people in World War 2 saw Hitler as a perfect man who could do not wrong, and the people of North Korea see Kim Jon Ill as the same today. It is all very well and good saying "well, X can't do evil because that is against X's character", but if you go down that path, you cannot distinguish between what is good and what is evil, and you start defending certain acts based only on the assumption that X cannot be evil.
What Hitler did was trick people into thinking he was perfect, and the same with Kim Jon Ill. If you have people believing that you can do no wrong, or no evil, then everything you do, nomatter how evil it might appear to anyone who isn't your follower, will be excused and explained away by your followers because they live under the delusional belief that you cannot do evil, and therefore any evil acts you do cannot be evil in the first place.
So what you are left with is the inability to say that God isn't just a supreme Hitler figure; that he does have an evil side, but has convinced his followers to believe that anything he does is good, even if it is evil.
What Hitler did was trick people into thinking he was perfect, and the same with Kim Jon Ill. If you have people believing that you can do no wrong, or no evil, then everything you do, nomatter how evil it might appear to anyone who isn't your follower, will be excused and explained away by your followers because they live under the delusional belief that you cannot do evil, and therefore any evil acts you do cannot be evil in the first place.
So what you are left with is the inability to say that God isn't just a supreme Hitler figure; that he does have an evil side, but has convinced his followers to believe that anything he does is good, even if it is evil.