In 1982, it was Bashir Gemayel, with the Christian Phalangist Militia, doing Israel's massacres in Lebanon. And in 2006, Israel uses Muqtada al-Sadr, and the Medhi Militia, to do it's killing.  

Israel Wants A Civil War

Their Interior Ministry Death Squads pick up forty Shiites, takes them out of town, shoot them in the back of the head, and throws them on Baghdad streets. An Israeli operative starts the rumor that it was a Sunni militia that killed the Shiites.

Now the Israeli sponsored Al Sadr Medhi Militia will kill a bunch of Sunnis. In the end, all of Iraq's potential leaders are dead, America pulls out, and Israel installs it's puppet government. Israel did the identical thing in 1982 Lebanon with their Christian Maronite Militia.

Simply ask yourselves, why would Muslims kill each other, and who benefits.