Osama bin Laden is going after us to get us out of the region, so he can deal with the regimes that he sees in the region, or replace them with purists. ↗
There are, of course, all sorts of other unpleasant regimes outside the walls as well - the military dictators of Latin America and the apartheid regime of South Africa. ↗
Where defining foreign policy as 'ethical' went wrong was that it implied that all decisions would be exclusive in every respect of any dealings with unethical regimes. ↗