In my opinion the answer is a bit harder than just a yes or a no. Islam is a relatively young religion, Christianity wasn't very peaceful when it was the same age but it developed into a more peaceful religion. Even nowadays, people will pick or choose what they really believe in from the Bible, some will be reinterpreted or some will be ignored. Islam hasn't really gone through the developing phase yet. It is still rather young and therefore in its purest form is quite vicious. That said, most people who say they follow Islam, especially those in the Western world have done the exact same as what Christians have done - pick bits they personally believe in and create a bedrock of opinions and norms. Most who support Islam don't agree with some of the violence the book preaches, and that is fine and good.