RAV KOOK ON Metzora: The Power of Speech

Only in Israel What is the root cause for the disease of tzara'at as described in the Torah? The Midrash explains that this skin disease is a punishment for gossip and slander. A person suffering from tzara'at is called a metzora because he is "motzee sheim ra" — he spreads derogatory reports (Vayikra Rabbah 16:1. See Rambam, Hilchot Tzara'at 16:15, that one fulfills the mitzvah "Be careful regarding tzara'at" (Deut. 24:8-9) by avoiding gossip). Given that tzara'at is brought about by slander, one would expect that all peoples would be afflicted, since even non-Jews are culpable for personal damages. Yet, Maimonides wrote that tzara'at is not a natural phenomenon, but a unique sign found only among the people of Israel. Why should only the Jewish people suffer from this ailment?