It would seem that instead of omnipotence, you meant omniscience.
If one is all powerful then one has the power of omniscience.
As for the common painting of God as evil, it's getting old. God has created an absolute moral system, which is really the only kind that works. Flimsy preferential morals do not work.
We know your god by his works, and according to christians he leaves a wake of woe and destruction. He's painted as evil because he is. There are no absolute morals, if for no other reason than that he breaks every single one himself and by default cannot be absolute.
Don't bother going down the absolute moral values road hand in hand with William Lane Craig. He's an intelligent solipsist who continually has his testicles crushed holding that opinion in debates with Sam Harris and Shelly Kagan.
There is no such thing as absolute moral values and the argument for it leaves me wondering how Craig keeps a straight face. If murder is absolutely wrong in all cases, then your god is the most evil creature in existence. If there are absolute moral values why would your god have raped a 13 year old in order to give birth to himself? If there are absolute moral values provided by your god, why does anyone dare wear mixed wool and linen clothes? If there are absolute moral values why is it deemed virtuous Lot offered up his daughters to be raped instead of the angels he harboured? If there are absolute moral values why does god not only approve but expect his sheep to keep slaves?
Morality: Using empathy as a guide for human interaction. AKA, "treat others the way you want to be treated" and "put yourself in my shoes". It has nothing inherently to do with the bible.
When morality is based on religious text, its equally OK to:
deny emergency medical aid to a child
kill gays, children who misbehave, anyone who works on a particular day of the week, entire groups and races of peoples, and many others for equally capricious reasons
buy and sell humans as chattel, including one's own family members
Karen Wynn of Yale has a study showing even babies have an idea of wrong versus right. Neuroscientist Christian Keysers has done research to show that the brain of those who see others receiving pain themselves have similar neurological responses. There is a curve to empathy; some feel it more than others. But it certainly doesn't come from a hateful book about imaginary people.
Humans and probably other animals exist on a spectrum of empathy.
http://en.wikipedia.org/wiki/Empathyhttp://en.wikipedia.org/wiki/Mirror_neuronFrans de Waal shows that even monkeys employ "morality"...
http://youtu.be/GcJxRqTs5nk