Syrian President Bashar al-Assad has fled his country, now under the protection of Vladimir Putin in Moscow. In only a few days, a regime that had withstood over a decade of brutal civil war crumbled into dust before the onslaught of a new rebel offensive.Now, Syria teeters on the brink of tribal mayhem as disparate factions espousing differing strains of radical Islamism begin to squabble over the carcass and jostle for power. ISIS has even reemerged as part of the victorious rebel coalition, prompting U.S. airstrikes over the weekend.But, on cue, the neocons crawled out of the woodwork to gloat,...