Hamas’s Oct. 7 attacks against Israel have provoked accusations of genocide. The massive scale, complexity, and lethality of the attacks are unprecedented. In The Atlantic, terrorism expert Bruce Hoffman has recently parsed Hamas’s founding covenant, arguing that it documents a long-term plan, and intent, for the destruction of the Jewish people in a way comparable to Hitler’s “Mein Kampf.” The Israeli government’s increasingly brutal military response to the attacks have generated similar accusations, often from unsurprising sources. On Oct. 10, the Palestinian envoy to the United Nations described Israel’s bombardment of Gaza “nothing less than genocidal.” Iran’s foreign minister, Hossein...