First of all, ISIS started in 2003, with Abu Musab al-Zarqawi. He also established an Islamic state, but it didn't hold. The Islamic State these days is stronger, and I think it has existed for over 160 days already. We see that they are based on the ground.
There are no simple solutions to the problems. I think that the military intervention in Iraq and Syria should be primarily based on the Muslim countries themselves, not by the west. The Americans did it in 2003. They gave the Iraqis democracy on a silver platter: “Take democracy. We have removed the tyrant Saddam Hussein. We removed the regime. We removed the army.” Everything was removed. They could do it, but we've seen that the problem is much deeper; it's not just giving democracy and they will take it.
Also, with regard to military operations in Iraq, I doubt if it can change the fundamentals of the situation in Iraq. That's why I think it should be based on the people themselves. They should do the job themselves and do the major sacrifices in order to gain the fruits of democracy and liberalism by their hands.