Though met by modest crowds, the recent first-ever Free Muslims March Against Terrorism could be considered a success in one key respect: It further exposed the unwillingness of most major Muslim groups to condemn the radicals that have come to dominate their religion. It also further cemented the growing reputation of organizer Kamal Nawash, head of the Free Muslims Coalition (FMC), as one of the only genuine moderate leaders of a national Islamic organization. While most Muslim groups gripe about being expected to condemn every Islamic terrorist attack — they aren't directly responsible, they reason — Mr. Nawash wastes no...