Current talk of an imminent retaking of Mosul sounds eerily like before Kennedy’s Bay of Pigs catastrophe in Cuba

Battle to Retake Iraqi City Looms as Test for Obama's ISIS Strategy is a scary headline which puts us on a side in a civil war.  Shia Militias want only revenge and will make Mosul a bloodbath where ISIS will look good among Sunnis.  As a strategy this operation does not have a good end game.  Why is Obama so blind to the tactic to break up Iraq into its three political unions, Shia, Sunni and Kurdish and force each region to look inward and serve its people as part of the grand strategy to pacify the region?