I think the tone of mockery Heller finds is a part of Mann's irony, but only a part - a brilliant further touch consists in juxtaposing perspectives so that we're led to wonder whether the mockery itself is the last word.
Philip KitcherKlaus Mann saw very clearly how different was his own (more liberated) form of homosexuality from the same-sex attractions of his father - and that is reiterated in TM's diary queries about "how two men can sleep together".
Philip KitcherIn working towards ways of reading Mann, so that his own advances in suggesting new perspectives will become more vivid, I do some fairly standard philosophical analysis of ideas in Nietzsche and Schopenhauer.
Philip Kitcher