Grossack soon had another opportunity to stand up for constitutional rights. When Israeli Knesset member and Jewish Defense League founder Rabbi Meir Kahane came to speak at a local high school in Brookline, Massachusetts, the town requested that his local supporters post a "security bond" to cover expenses resulting from the anticipated confrontation with opponents. Grossack made news by threatening the town of Brookline with a lawsuit for violating Kahane's First Amendment rights. Brookline backed down, and Kahane spoke at the High School.