The problem with ISIS

The much feared ISIS is nothing but a group of mercenaries. They typically fight for Sunnis and is guided by team Saudi Arabia. But ISIS has only trained for supporting dictatorial regimes. They are very good at keeping regimes in place. But not so good at toppling regimes. Hence they are not seeing success in Syria. On the other hand dictators of the region are very good at staying in power. Thus the Syrian war is so far advantage Assad. Assad keeps Syria secular but as of now he has too much blood of his countrymen on his hands. He needs to go.