Much blame has been placed on the West, the U.S. in particular, for creating ISIS. The failure to actually accomplish the mission in Iraq, blunders in Afghanistan, leniency toward Assad in Syria, and overall hatred of the U.S. are cited as a rationale for the rise of militants.
Of course, it begs the question: Is the U.S. government or western corporations responsible the problems? Is it the drive for oil and the thirst for profits that engender the hatred? Fast food, fast cars, mass consumption, cheaper clothes, loud music, lack of respect for cultures, religious differences fueled by greed, and a host of other issues that rise from economic colonialism and globalization are, perhaps, the real culprits in the rise militancy.
If we fight for liberty, the right to choose, the right to life, to practice beliefs freely, to live without fear, the rights of all (definitely for women), and rights regardless of religious beliefs, then we can rightly be blamed. If this issue arises because of economics, then we can rightly be blamed. So I guess in a big way, the West is responsible, but this is amended by the fact that there are those who seek power just to have power and who will kill because they can. This is also true of ISIS.