Allah discouraged Muslims from passive expressions of faith. To prove one's faith, Allah demands action. Specifically and most importantly, jihad — fighting in the way of Allah. Fighting to establish the legal domination of Islam. It is Islam's prime directive.
You and I may think it is wrong, but to a Muslim, it is right. It is commanded by Allah. What could be more right than that to someone who believes it?
The world must awaken to the existence of such a creed and stop blinding itself with wishful thinking. This is not going to go away.