Halachic Guidelines on Business and Interest in Jewish and Non-Jewish Relations in Morocco

Question: What are the halachic guidelines regarding business dealings and interest (ribbit) between Jews and non-Jews, particularly in light of historical events in Morocco? Answer: It is strictly prohibited for a Jew to charge another observant Jew interest; violators lose their share in the World to Come, except when the borrower openly violates the Sabbath, but even then, it's discouraged. Charging interest to non-Jews is also widely misunderstood and dangerous. King Solomon's decree forbids charging interest to anyone, and while some opinions allow minimal interest to non-Jews for sustenance, excessive rates are forbidden due to their historical link to anti-Semitism, as evidenced in Morocco and across Europe. Engaging in predatory lending or overcharging, especially non-Jews, not only invites anti-Semitism but also constitutes a greater sin due to the Chillul Hashem it causes, as it maligns all Jews. Ethical business conduct is mandatory, especially towards non-Jewish hosts.