Businessmen in 40 countries, including G20 countries, are financing these terrorists, or Daesh.
Putin answers reporters questions in late 2014 about who IS really is. They are hired mercenaries:
(https://youtu.be/OQuceU3x2Ww) 7 min. 11 sec. This video cannot receive too many views.
Edit 11-20-15: The whole geopolitical scene has been changing with lightning speed since this year’s G20 meeting in Turkey. It’s incredible to behold!