A more complete version of the previous quote from Simone Weil, from a letter to Georges Bernanos:
What you say about nationalism, war, and French foreign policy after the war is equally sympathetic to me. I was ten years old at the time of Versailles, and up to then I had been patriotically thrilled as children are in war-time. But the will to humiliate the defeated enemy which revealed itself so loathsomely everywhere at that time (and in the following years) was enough to cure me once for all of that naive sort of patriotism, I suffer more from the humiliations inflicted by my country than from those inflicted on her.
Related, Vaclav Havel, in his 1990 New Year’s Address to Czechoslovakia:
Self-confidence is not pride. Just the contrary: only a person or a nation that is self-confident, in the best sense of the word, is capable of listening to others, accepting them as equals, forgiving its enemies and regretting its own guilt. Let us try to introduce this kind of self-confidence into the life of our community and, as nations, into our behavior on the international stage. Only thus can we restore our self-respect and our respect for one another as well as the respect of other nations.