ユダヤ教で「家族を訴えること」は罪ですか？

Judaism has the most matter-of-fact relationship with family litigation — because Judaism has its own court system. The beit din exists precisely so Jews can resolve disputes — including between brothers — under Torah rather than under strangers' law, and halakha developed arbitration (and dina d'malkhuta for civil matters) with full procedure. Yet the value hierarchy is unambiguous: 'love peace and pursue peace' (Avot 1:12) heads the ethical tradition, and the Talmud states that a court that always rules by strict law is defective — pesharah, compromise, is sought before judgment (Sanhedrin 6b). Aaron, the prototype peacemaker, is praised for chasing peace between quarreling parties; Hillel's school taught concessions for the sake of peace even where the strict law favored another result. The classic Jewish resolution of family money disputes is the din Torah before a beit din with a pesharah orientation — formally adjudicated, settlement-shaped. Where one party refuses, Jewish law permits civil court (with halakhic guidance). And there is a sober footnote the tradition adds: estate litigation between siblings — the most common family lawsuit in every era — is the case the rabbis grieve most, because it auctions a parent's memory for shares of it.