For the west to be longsighted and not support extremists groups at the sake of making money or short term goals. ISIS would not be anywhere as powerful as it is today if western powers didn't illegally occupy iraq and completely remove all army personnel and councillors. Borders were left open and many ex-soldiers started working with al qaeda to fight the occupation. Al qaeda was non existant during Saddam's time. It simply wasn't there. ISIS is an offshoot of al qaeda. The west supported and financed al qaeda against the Russians in Afghanistan. Also the west's attempt of removing bashar by supplying weapons to the ''moderate rebels'' in Syria was just stupid. A lot of these weapons ended up with ISIS making them stronger. We all know that the west supports Saudi Arabia, a big funder of extremists organisations. Saudi Arabia is the UK's biggest purchaser of weapons. The less powerful ISIS and Al Qaeda are the less propaganda there is to brainwash people with. There are many factors leading to the mess we are in and the west's middle east policy is one factor.