We don't have a real argument, do we? Rights are the basis of justice.
there is evidence that no Muslim had any legitimate grievance against the US foreign policy of the 1990s
Exactly so.
What is a lawless government, besides a tyranny, if it is not organized injustice? In fact, all such lawless governments represent is a kind of top-down anarchy, and probably a thing more to be feared than the anarchy of lawless individuals. At least where there is no government, people can gather together into voluntary communities where some sort of just society, with the resulting liberties, can flourish. When a government stands for nothing but injustice, and has a monopoly on the power of the sword, there is nothing but the hierarchial anarchy of tyranny and totalitarianism.