Why can't fanatics understand other fanatics

The United States was born in 1620 when a bunch of fanatics from England crossed the Atlantic in a ship called the Mayflower and landed on the coast of New Plymouth, a day still celebrated as Thanksgiving Day. They were Puritans, an extreme Protestant sect, who saw England as ' ungodly ' even though the reign of Elizabeth I, between 1558 and 1603 is considered a Golden Era for England, politically, militarily and culturally. Such was their fanaticism that they considered the New World as devoid of people because they did not consider the native Indians as human beings. " The place they thought of was one of those vast and unpeopled countries of America which are fruitful and fit for living. There are only savages and brutish men, just like wild beasts." So, though they initially survived with the help of Indians, it was easy to hunt them down as animals and eventually confine them in Reservations, where they remain till today. As immigrants poured in from Europe they grabbed California, New Mexico and Texas from Mexico. The purchase of Alaska on 30 March, 1867 from Russia for $7.2 million was sheer genius. The ability to see humans as wild beasts allowed slavery to flourish until it was ended by the Civil War in 1861-65. Given this history one would think that the Americans are uniquely qualified to understand the hatred between Sunni and Shia and the ferocity of the ISIS fighters as they rampage across Iraq in an attempt to establish a Sunni caliphate. They still see the unprovoked attack on Iraq, based on lies about Weapons of Mass Destruction, which killed 200,000 Iraqis, as sacrifice. Apparently US Vets are heartbroken because there efforts to make Iraq a civilised country has failed. They cannot understand why Iraqis are not living together as one large happy family when they used depleted uranium, white phosphorus and cluster bombs to slaughter tens of thousands of innocent children. Walter Russell Mead, Professor of Foreign Affairs and Humanities at Bard College writes that the US has a happy view of history. " Americans tend to believe that history is easy and that things usually work out for them," he writes. The US has an infantile view of good and evil which is why it allowed Sunni Pakistan to make nuclear weapons while imposing severe sanctions on Iran. It wants Nouri al-Maliki to embrace the Sunnis who, supported by Saudi Arabia and Gulf states, are killing Shias. The only way to stop ISIS maybe to ask Iran to help. The Gulf states will be no match for the Iranian army but that may draw in the 2 huge Sunni armies in Turkey and Egypt. Fanatics of the US do not understand fanatics of Sunni and Shia. We should just sit and watch the fireworks.