If there is no other God above the Abrahamic God, and He knows this, is God an Atheist?

As Walt and Dark Majinn show above, the question is not black and white and can be looked at from different perspectives. One helpful viewpoint is that God is not of one mindset but actually has many "faces". 

There is a minority of Christians that believe Jesus was/is God or one part of his psychology. There is the God of Old Testament, there is Allah which is simply the Islamic version of God, New Testament God, and the God of the Torah. 

God has been shown to show mercy in parts of the Bible and Koran as well as destroying entire cities in other parts. This would be much to extreme for an entity of a single moral compass to do. A God of a single mindset could be called an "atheist" under your logic yes. But Since the Abrahamic God seems to have different personalities and moral codes depending on different situations, then he'd have to not believe in any of his other qualities to be an atheist. He'd have to forget the fact that he create the Earth then later threatened to destroy it for Jesus, who can be argued is another quality of God's differing personalities. 

He seems to change his own ideology depending on what he feels we or the Earth needs at the time. When he thinks we need to be slapped on the wrist he turns wrathful. When God/Allah thinks man needs a little hug, he turns merciful. This might sound blasphemous and nonsensical, and I'm not saying if I agree with it or not, but this could be given as an excuse as to the fact that God couldn't be an atheist unless he disowned his own differing agendas and "faces"