That's not true. The war was marketed entirely within the context of 9-11. Here's the president in the opening minutes of his Cincinatti speech:
We also must never forget the most vivid events of recent history. On September the 11th, 2001, America felt its vulnerability -- even to threats that gather on the other side of the earth. We resolved then, and we are resolved today, to confront every threat, from any source, that could bring sudden terror and suffering to America.
Cheney called Iraq the "geographic base of the terrorists who had us under assault now for many years, but most especially on 9/11."
Bush, in 2003, said "the battle of Iraq is one victory in a war on terror that began on September the 11th, 2001."
Now who's grasping?