Why do muslims like suicide bombing,and their islamic leaders autocratic,call for Jihad when confronted ?

You can see that most islamic countries are highly unstable. Any little squabble results to suicide bombing, religious extremism, and when the free world confronts them, they start talking of Jihad. Just like what Iran is doing now trying to enrich uranium which may be used for atomic bomb as the world fears. Why can't they listen to the international community now before it is too late? Something happening in Iraq is even causing angry protest in some islamic countries not minding that the ouster of the dictator Sadam was the main reason for it.Does it mean that Islam teaches violence? If not why don't other religions do like muslims in terms of suicide bombing? Osama bin Ladin is a muslim , isn't he? Hezbolla leader is a muslim, isn't he? These people are just a few. In Britain today, you will hear terror plot all by Brish muslims,why must it be muslims alway? Don't they like peaceful and quiet world. What is Islam by the way?