I think that civil war is the last thing that we need. Civil wars are horrible, bloody, scarring events that tear every part of a society - families, friends, neighborhoods. Also, unlike the last civil war we had, I doubt we'd have a government on government fight, grey vs. blue. I think we'd have a fuckload of terrorists, militias, and other miscellanious groups attacking each other, civilians, and governmental figures while the government responds by increasing its use of force.
Nobody wins, and if things get really bad, we'd end up like Yugoslavia, or worse, Sudan.