London: Chickens Coming Home to Roost?

This was my first thought when I first heard of the London bombings. Not that those innocent people deserved to die. That is not what I'm implying. It's just that Westerners are kidding themselves if they don't have any expectations of violence coming from abroad. The United States, the United Kingdom, and it's allies are conducting a war of aggression that has produced thousands of innocent causalities. They have bombed and killed people in Iraq and Afghanistan in just the same way that terrorists have killed in New York, Madrid, and London (also let us not forget that the killings of the US, and UK are on a far larger scale]. I assure you that for every bomb dropped on Baghdad there builds in someone on this planet a yearning to drop a bomb on a Western capital. This isn't out of my own personal experience. I only speak from my understanding of human nature. Man's thirst for revenge is strong (just ask George W. Bush).
But in all this talk of retribution it's important to keep a clear perspective on the true scope of this conflict. For each act of terrorism attributed to Muslims are conducted by a very small groups of men. These few men have highjacked the public perception of a faith practised by a billion people. In no way does this equate to the actions of the leaders of the Western powers who are elected by millions, and carry out war plans with billions in public funds. Who really should be held accountable for these crimes against humanity? Who is truly at fault? Who hypocritically talks of the doings of evil men, while still carrying on with the evil killing of Iraqis?