On treatment of opponents, here's a quote of Nietzsche (Will to Power, § 374)
Every society has the tendency to reduce its opponents to caricatures-at least in imagination-and, as it were, to starve them. Such a caricature is, e.g., our "criminal." Within the aristocratic Roman order of values, the Jew was reduced to a caricature. Among artists, the "philistine and bourgeois" become caricatures; among the pious, the godless; among aristocrats, the man of the people. Among immoralists it is the moralist: Plato, for example, becomes a caricature in my hands.