Or HaChaim on Exodus 34:15/אור החיים על שמות ל״ד:ט״ו

1 פן תכרות ברית, "lest you enter enter into a covenant, etc." The Torah stresses that although the Canaanites would be prepared to accept the seven Noachide laws as a pre-condition to such a covenant, the Israelites must not conclude such a covenant with them. The reason is that these nations would display an irresistible temptation to engage in idolatry with their former deities as they do not truly believe in G'd, a fact which is evident to every student of Kabbalah. וזבחו לאלוהיהם, "they will offer meat-offerings to their deities," and they will invite you to participate in such meals. We have been taught in Avodah Zarah 8 that a Jew is considered as having participated in such a meal from the moment he has accepted the invitation to participate based on the word מזבחו. In chapter four of his treatise Hilchot Shechitah, Maimonides prohibits Jews from eating meat slaughtered by a Gentile even if he does not worship idols and the slaughter was performed under the supervision of a Jew. G'd detests the fact that a Gentile slaughters a beast. [Maybe in order to qualify for the right to kill animals for food, man must have demonstrated his superiority to the beast by observing at least the seven Noachide commandments. Ed.]