The typical reaction of liberal intellectuals is to seize on the contradiction here: How can something be both wrong and right, or at least both wrong and OK, at the same time? What liberal intellectuals fail to see is that this so-called contradiction expresses the quintessence of the Machiavellian and therefore the modern, a quintessence that has been thoroughly absorbed by the man in the street. The world is ruled by necessity, says the man in the street, not by some abstract moral code. We have to do what we have to do.
If you wish to counter the man in the street, it cannot be by appeal to moral principles, much less by demanding that people should run their lives in such a way that there are no contradictions between what they say and what they do. Ordinary life is full of contradictions; ordinary people are used to accommodating them. Rather, you must attack the metaphysical, supra-empirical status of necessità and show that to be fraudulent.