Well, first, I don't care how history's going to interpret it.
And second, terrorism has been a detriment to American society. Going after somone who helps sponsor it, FOR THAT REASON no less, is easily identifiable as a tactic that serves the interests of Americans and is not being executed solely for the sake of altruism. Whether or not you agree such a goal could be reached the way we're going about combatting a terrorist sponsor is irrelevent in the face of our intent. "Our own country" is the most important segment of Bush's quote.