If you are saying that the current situation means that Bush was right to go after Saddam after 9/11 rather than really cleaning up and finishing up in Afghanistan, then I think you are wrong. I think you are confusing correlation with causation. If Saddam’s officers had not been thrown out of their comfort zone, and we had effectively fought Osama bin Laden and weakened Al-Qaeda, then ISIS probably would not have happened.
Bush never connected those dots. I just added a few.