Restraint and civil war

Iraq shows all the signs of descending into civil war, says Fareed Zakaria in his column for Newsweek, except for one. The strongest grouping in the country, that of the Shias, led by Ayatollah Ali Sistani, is showing restraint, and refusing to respond to insurgent attacks on it. Will it last after they get an absolute majority in the elections? Zakaria thinks so.