dieseldick, andy-hughes and vetuste_enne mi both point to the ambiguous premise of the "Who Created Isis?" : think of the answer to 'who created you dieseldick?' and the simple answer 'my mum and dad' , but someone created your mum and dad all the way pack to tetrapods or God,depending on your belief.
Who brought about the conditions for the creation of ISIS is maybe a different question and one no-one has answered that yet.
According to the President of the United States of America, President Obama
" ISIL is direct outgrowth of Al-Qaida in Iraq which grew out of our invasion which is an example of unintended consequences which is why we should generally aim before we shoot. "
http://www.haaretz.com/video/1.647337
And here is Hillary Clinton claiming the US created al-Qaeda, take your pick:
https://www.google.co.uk/search?q=hilary+clinton+we+created+al+qada&ie=utf-8&oe=utf-8&gws_rd=cr&ei=3ukLVYf0D8PUObq_gNAH
Try and do some research and reach ( or not ) your own conclusions.
Good Luck.
and here is Zbigniew Brzezinski admitting Carter provoked USSR into invading Afghanistan in the first place
http://williamblum.org/essays/read/how-the-us-provoked-the-soviet-union-into-invading-afghanistan-and-starting
How far back in the causal relationship do you want to go?
Here is another interesting, non-Main Stream Media take on the background to Afghanistan by Blum
http://williamblum.org/chapters/killing-hope/afghanistan
Will we ever get to the Truth? probably not if the trash that writes much of #History# has its way.