Supersessionism sounds like an academic concept, but it’s not; it’s personal. It refers to the belief that the Christian gospels replaced the Hebrew Scriptures, so Jewish practices are no longer necessary. This process repeats, with the more disembodied, rational worldviews always replacing (and suppressing) more earthy, messy, mystical, mythic traditions. Christianity supersedes Judaism, Protestantism supersedes Catholicism, and technocratic modernity supersedes religiosity altogether. It’s the society-scale version of our inner child getting crushed under the weight of rationality and being yelled at to grow up. Something vital and alive is lost. I don’t accept it, and you don’t have to either.
Supersessionism has the focus all wrong. At least in Christianity supposedly replacing Judaism.The focus is not on how I, or my group, chooses to follow or respond, but on the Divine initiative or promise. The promise of the Divine (to love, to accompany, to save, to inhabit) is assured, is guaranteed. If it were not so for the “initial” group, why would the “next” group trust it? The challenge is interpret the varied manifestations.