The story of Genesis really describes a very bad god. If moral standard were based on religion such as those that based on old testament, we would all be in stone age still.
Because "now nothing which they purpose to do will be impossible for them" (verse 6), god decided to confuse man's language so that they will not understand one another’s speech.
I really cannot understand the motive. If I were the creator of something intelligent, would I like to see my creation furnish to its full potential? Is god afraid of man creating something? What would that be? The truth that god actually does not exist?