My point is not to say what is preferable. I was just pointing that saying "A part of not assassinating Assad is that he was fighting the extremists (aka ISIS)

My point is not to say what is preferable. I was just pointing that saying "A part of not assassinating Assad is that he was fighting the extremists (aka ISIS)" is not true, as ISIS was a minor player at the beginning, and as Assad and ISIS shared some interests during the first half of the war, and somehow helped each other. It is not a judgement, it is a fact.