By Yehuda Kurtzer A long-simmering conflict between CAIR, the Muslim-American civil rights organization, and the Anti-Defamation League has now reached the boiling point. A Bay Area CAIR leader dismissed the ADL and groups like it as “polite Zionists” who could not be trusted as allies. ADL’s CEO, Jonathan Greenblatt, fired back, calling her comments “textbook vile, antisemitic, conspiracy- laden garbage.” It would be a mistake to see this as a mere spat between two organizations. It reflects what could be an alarming turning point in Jewish-Muslim relations in America, and a symptom of how polarization can undermine civil society. All...