Iran and Syria are the nuclei of the radical Islamic threat.
They are the core threat today in the Middle East. As many know, Iran has been emboldened and rewarded over the years for engaging in these activities. Our inaction after British sailors were taken captive is but one small example, nor was it the first. Our withdraw of troops after the Beirut bombing, something Iran was behind is another example in historical context. The lack of action after Iranian agents went on a killing spree in Europe years past, or the direct threats of their leaders against foreign leaders with complete inaction from the West all adds to this perception. Realize that some of Irans senior leaders in their military are actually personally involved with the murders of people in Europe and on the wanted list. Their direct meddling in Iraq which includes EFP, IR sensors, MANPADS, 50 cal sniper rifles, GPS (Improves mortar accuracy), money, intelligence and advisors even; despite this killing our troops were not willing to take action. You have mock attacks on ships and there too we do nothing nor was the latest bout unique and new, its happened several times. In 2006 Iran de facto waged a somewhat successful, at least in their eyes, war against Israel, all funded and logistical supported through back door intelligence channels by Iran, with complete impunity once again.
Its real simple. Iran over the years has been taught that they can achieve their foreign policy objectives through terrorism. They, as in the state of Iran, created some of the terrorist groups found today committing some of these acts! Some of their most senior leaders are no kidding terrorists on a wanted list, but even that is downplayed and governments like in Austria where some of these attacks occurred are willing to sell nearly anything to them. What does that tell Iran?
So, now were all supposed to be shocked that their leaders advocate more of the same, which they see as being a highly fruitful way to do business? If something in your life brings good results and costs you little, what do you generally do?
You forgot one.
Saudi Arabia is the largest sponsor of terrorism on the planet.