In Bambachs, Heidegger Roots, he offers an authoritative analysis of the manipulations practised by Heidegger in his Nietzsche lectures between 1936-45. He calls them a 'philosophical cover-up' consciously engineered by Heidegger and a 'strategy of elision and omission' and 'a self-conscious practise of political cleansing.'
Q. What were the nature of this 'cover-up'?
Q. And what was Heidegger intending by it?