Burned the ancient significance, blew up church, Killing innocent people, are these their way of justice and fairness?
The sad truth is that there is NO dipomatic or human solution against those warlords.
You are wrong. ISIS can be easily defeated, if their foreign support is destroyed. It is the financial and political support which they receives from Saudi Arabia and Qatar, which makes ISIS invincible.
obviously some are funding ISIS, ISIS might be merely a hapless tool controlled by some countries.