Proust notes Charlus’s mercy for Germany as an aspect of his Charlusism: his homosexual desire for lovers who torture him. Germans are not the beautiful lovers who torture him: Germans are ugly to him (just as he is ugly to his beautiful lovers). Thus, by defending “ugly” Germans at end of world war 1, it must be Charlus is showing some occult mercy to himself somehow. But Proust does not mention that conclusion.
I turn to Proust in the middle of the heartbreak of Typhoon Yolanda that decimates Tacloban, and in the middle of chemotherapy for this dratted cancer, November 10, 2013.