What happened in Karm al Zeitoun? Over the past week, reports have emerged of at least three Sunni families were brutally slaughtered by regime-backed Allawite thugs known as "shabiha." Stories of a brief but brutal campaign of ethnic cleansing in the mixed neighborhood of Homs, means some people's worst fears are coming true: The conflict is becoming sectarian. Allawites, too, report killings of their own by Sunnis. Each side says the other is pushing the people toward the brink of sectarian war.