"Have your other eye checked, Jonesy. There is nothing good about this religion!"
You know the same thing could be said of Christianity with it's bloody wars that spans the history of Europe. Why did these countless wars between Catholics, Protestants and Muslims take place? Because people have perverted a teaching of peace into the practice of war. And this kind of divide still goes on in places like Ireland. My point is that people have a choice to emphasis what they want out of a holy text. The old testament contains passages of some of the most gruesome and bloody acts ever committed by a God, but does that mean we should do the same! If we just wanted to follow the old testament teaching of an eye for an eye -- you know: If my eye offends thee... I'll pluck out yours so that you don't see me! -- then we are just as barbaric and blind as the Muslim fanatics. But we also have the new testament which has a lot to do with love, forgiveness and turning the other cheek. We have choices to make because Christianity and Islam are very questionable in places... and it's how we interpret those religious texts that will determine the quality of our life.
Islam records bloody acts in the past and teaches that they be replicated now and in the future. Their service to God is by repeating the past in disservice to their fellow man. This is the word of the Koran.