The answer is that Menachem Mendel Schneerson was rumored to be the Messiah. Schneerson was the seventh and last Rebbe of the Chabad-Lubavitch Hasidic dynasty. He was a prominent Jewish religious leader and scholar in the 20th century. Some of his followers believed that he was the long-awaited Jewish Messiah.
Discovering the Life and Legacy of Menachem Mendel Schneerson: The Beloved Orthodox Rabbi