Must Heidegger embrace dialetheism?

In Heidegger and the Contradiction of Being , Filippo Casati argues that Heidegger has powerful reasons to accept as well as to reject the ontological difference (understood unrestrictedly as the thesis that Being is not a being in any sense), that he meets the trouble he thus faces by conceding that some contradictions are true (and thus embracing dialetheism), and, finally, that his philosophy remains cogent for all that. I outline two concerns for this project: first, with two philosophical arguments that, in Casati’s view, support the thesis of the ontological difference understood in the unrestricted fashion, and, secondly, with Casati’s assumption that Heidegger understands the ontological difference in this way, drawing here on recent work of Kris McDaniel and my own.