View of Islam, is it a religion of peace?

The recent acts of violence, including 9/11 suggest otherwise. No religion in these modern times can profess to be peaceful and yet support acts of cold blooded murder. I put emphasis on the religion because this is where the violence is emanating from and condoned. This is what I hear and read, not just in western news, but Muslim as well. The piece on the project promoted by the president of iran that there was no holocaust suggests there is quite a propaganda machine in the muslim world.