This essay attempts to offer some reflections on what it is that Jacques Derrida found uncomfortable in Martin Heidegger’s thought at the level of fundamental gestures. The region of disagreement is located in Derrida’s self-identification in a marrano register at an autographic level. This paper studies the notions of propriation and expropriation in Heidegger’s late texts and compares them to Derrida’s ‘uncanny propriation’ as a marrano notion. I offer four propositions regarding Derrida’s marranismo, which I align with Derrida’s proposal for (...) desecularization, tentatively described as a ‘messianic engagement with the khora’. I conclude with a proposal for the development of ontic models of marrano action that would antecede the theory/practice divide. (shrink)