What caused the killing of the US diplomat and his staff? Lindsey German, convenor of Stop the War Coalition, says the people of Libya and other Muslim countries have faced 11 years of western intervention which has only brought death, destruction and chaos. At root of these killings is American foreign policy which has been disastrous in Iraq, Afghanistan and Libya, and is threatening more war in Syria and Iran. It has to be changed. Until it is there will be more incidents of blowback from Muslim countries suffering from western intervention.