Evidence or it didn't happen, FSA =/= ISIS, take your own advice and do some basic historical research.ISIS is along a similar vein. Most of its top people were former lackies of the CIA. Both the Mujahideen and ISIS members were originally supposed to serve as a buffer against the Soviets and keep Iran in check.
No they did not come out of nowhere they were formed during the 2nd Gulf War as AQ in Iraq, after they were defeated during the surge they fled back across the border to Syria which had been previously allowing them to travel through their borders and into Iraq to fight Coalition forces, during the civil unrest and fighting against Assad he experienced the blowback of ISIS turning on him and ISIS was able to become stronger due to the fact that Obama refused to fund and arm the FSA which ended up with ISIS rather than the FSA obtaining a larger share of recruits during the aforementioned civil war in Syria, and now that they have been able to grow in strength within the power vacuum in Eastern Syria and with the pullout of US forces have filled another power vacuum this time back in Iraq.You seriously think that ISIS just appeared out of nowhere, and is able to battle the American army with a bunch of rag tag tribal infantrymen and some former Iraqi soldiers?
You're the one who needs to pick up a book and maybe a newspaper or two because you're spouting historical falsehoods and outright bull****.Please pick up a book before you choose make incorrect assertions out of some misguided sense of nationalistic pride. Your government is lying by admission and not very well anymore I might add.