Assad is no threat to us.I’d have to go along with Russia on this. Just my 2 cents.
It seems like Assad is more of a problem for Saudi Arabia which has, by default, made him a problem for us due to the long and complex relationship between America and Saudi Arabia. There’s also an Iranian and Russian aspect which further complicates matters. Ultimately, however, it’s really all about the relationship between oil and US dollars and America will do whatever America has to do to protect that relationship.