I do not think the object of a race war is to "win", so much as destabilize the current form of government.
Cries for security will outweigh cries for liberty, and Liberty will be lost by all. Look at what happened under the "Patriot Act", supposedly crafted by "conservatives".
The Marxists pushing the concept of a Race War will seize the opportunity to gain and/or entrench power at the behest of the formerly freer people, and those canon fodder thrown in the way will be considered expendable--on both sides.
Whatever the object, if it happens it will accelerate blacks being replaced by hispanics in influence and opportunity.