As BAD as ISIS are as killers compared to the United States they are but amateurs. The death toll in the undeclared Vietnam war is estimated at almost four million, i say estimate, because there was so much killing nobody really knows. Americas financial and logistical support of right wing military Juntas in Central America killed an estimated four hundred thousand mostly innocent indigenous natives. Americas illegal invasion of Iraq has seen the death toll climb to over a million. Afghanistan another illegal American invasion now has a death toll of over 300,000. And we haven't even began to touch on CIA involvement in Pakistan ,Africa or South America.