Scholar Philip Jenkins argues that scriptures in the Quran are less brutal than those in the Bible. In his new book, "Jesus Wars," Jenkins points out that violence in the Quran is mostly defensive, but in the Bible, it is often a method of genocide.

As the hijackers boarded the airplanes on Sept. 11, 2001, they had a lot on their minds. And if they were following instructions, one of those things was the Quran.

http://www.scpr.org/news/2010/03/18/is-the-bible-more-violent-than-the-quran/

OT bible is unbeatable when it comes to genocidal acts. All hail Jehovah Bloodbath! The scholar is definitely right.

There is no comparison since what is portrayed by anti-Islamic media as violence in the Quran is not really so, rather out of context of what is a just punishment, for example, for those who cause mischief on the earth or murder. Punishing them so they don't commit these crimes again is justice and not violence. To the contrary, many Biblical passages clearly cross the line where supposedly under God's command innocent people including infants, animals and trees to be utterly destroyed.
Thus, it is the Bible that is violent, while the Quran protects innocent life, and permits taking of a life only through the way of justice, as in a 'life for a life' situation, or to stop those who spread mischief.