I believe that Heidegger is not an atheist. In his writing “Letter to Humanism” he is not taking a stance on God, he is stating that Philosophy does not deal with God. This is because for Heidegger, God as the ultimate being as a result of the Platonic tradition, which confused the "Being of beings" with the most absolute or greatest Being, which over time the idea of greatest being incorporated also the idea of God. I think for Heidegger, the proper place for philosophy and the concern of philosophers is not God, but Being itself, the openness or clearing in which even God as the Greatest Being, finds his being. The notion being that God is a concern of the clergy and the religious aspect of one's life. God must exist as a mere particular
