Short sightedness. Assad has millions of Syrian people that oppose him and he doesn't control. What do you suggest, he exterminates them all?The UNSC didnt ask for ****, the UN did.
The UNSC is the real branch of the UN and it's just a fecal throwing match between Ex-Commies and Ex-notcommies, it is so indescribably pointless it borders on humour. With that out of the way, until the rebels **** off categorically or everyone actually agrees to a settlement, this is all they're going to get.
Also...
UNSC indeed asking for ****