Keyplus,
// Then last year (or So) Americans created ISIS... Americans declared them as terrorists (perhaps change of mind). //
Not quite. The US declared them a terrorist organisation in 2004 when the were part of the insurgency against the US invasion of Iraq. The organisation has had many names, al quaeda in Iraq, ISI, ISIL, ISIS and now IS for short, but its aim, of a caliphate has always been its guiding tenent.
There is possibly a conspiracy, but you are wide of the mark above. Politically, bringing home the US troops was an election promise of Obama and widely supported by he US public. So the US withdrew before Iraq (and Afghanistan) were established, compliant US supporting puppets in the middle east. The threat from IS may be being exaggerated as a pretext for going back and completing the job (of moulding them into US friendly puppets).
The public in the US had no appetite for returning to Iraq, so a new front was allowed to open in Syria, and the US public were encouraged to support defeating Assad who was a good old fashioned Commie. Except opposition politicians in the US and UK conspired to halt the rush for a new war. Obama (and Cameron) needed a new reason to resume hostilities, and it was at this stage that ISIL was elevated from minor player to al qaeda on steroids and the greatest threat to mankind. So today, Obama and Cameron have got what they wanted, both the US and UK returning to Iraq for a third war.