Richard Dawkins, is a celebrated biologist and is well know for his war against fundamentalism in religions. Here is a small video of him describing God in the old testament.
Warning : The following might be offensive for some. So read at your own risk
Richard Dawkins: The God of the old testament is arguably the most unpleasant character in all fiction. Jealous and proud of it, apathy, unjust, unforgiving, control freak, a vindictive blood thirsty ethnic cleanser, a masogenistic, homophobic, racist, infanticidal, genocidal, philicidal, pestilential, megalomaniacal, sadomasachistic, capriciously melovalent bully.
Here is the video