I suppose this is a rather incomplete answer.Allah is just the Arabic name for God. Arab Christians also call God Allah.
Here is the complete answer:
Genesis 11:1-9
And the whole earth was of one language, and of one speech.
2 And it came to pass, as they journeyed from the east, that they found a plain in the land of Shinar; and they dwelt there.
3 And they said one to another, Go to, let us make brick, and burn them thoroughly. And they had brick for stone, and slime had they for morter.
4 And they said, Go to, let us build us a city and a tower, whose top may reach unto heaven; and let us make us a name, lest we be scattered abroad upon the face of the whole earth.
5 And the Lord came down to see the city and the tower, which the children of men builded.
6 And the Lord said, Behold, the people is one, and they have all one language; and this they begin to do: and now nothing will be restrained from them, which they have imagined to do.
7 Go to, let us go down, and there confound their language, that they may not understand one another's speech.
8 So the Lord scattered them abroad from thence upon the face of all the earth: and they left off to build the city.
9 Therefore is the name of it called Babel; because the Lord did there confound the language of all the earth: and from thence did the Lord scatter them abroad upon the face of all the earth.
In fact, this ties into exactly what I said in my first post, Jung and his theory of the collective unconscious. People from all around the world, even isolated tribes that had no outside contact for thousands of years, all have similar ideas, they believe in God, a soul, an afterlife, judgement of the dead, a global flood, etc. Think about how different modern day Egypt is from King Tut's Egypt, or Ozymandias' egypt, of which nothing remains. Think about how different Egypt is from the Aztecs or Chinese. There is no cultural explanation possible for this. Mankind has imprinted on its very essence, certain ideas.
This is a proof FOR God, rather than against God. In fact, it even has a name, the Trademark argument, formalized by Descartes as an ontological proof.