I got news for you the united states have been executing muslims since 9/11 with drones,now its up to you to choose which is more babaric,useing a missile to blow you to pieces or a beheading,which is very common,the syrians having been doing it so has the saudies,and its was done in lebanon.
Remember Obama had said the united states is at war with isil,which was like the death sentice on the american held hostages.