ユダヤ教で「カジノで働くこと」は罪ですか？

Judaism approaches the casino paycheck through its own categories. Non-Jews are not bound by Jewish gambling law, so a casino serving mostly non-Jewish customers is a lawful business from the customers' side, and serving a lawful business — even one a Jew himself should avoid — is generally permitted. That said, the tradition's own valuation runs negative: Sanhedrin 24b's professional gambler is 'unfit' precisely because he 'contributes nothing to the building of the world,' and a livelihood philosophy built on that text pushes observant Jews toward work with obvious constructive output. Roles that would involve Jews directly in gambling (promoting play, extending credit to chase losses) draw rabbinic criticism both for the gambling facilitation and for lifnei iver — putting a stumbling block — toward one's neighbor. A common modern psak pattern: the blackjack dealer whose customers are non-Jewish is working; the observant Jew is advised to prefer other work where available, but there is no halakhic prohibition on the service roles. The tradition's pragmatic core: work is dignified (Avot 2:2 pairs Torah with work), and dignity plus direction matters more than the carpet's motif.