a natural disaster is not comparable to all out war, though. sure, under those conditions it is sink or swim. but, after air raids and possible land combat, the militias you are describing could be targeted and killed by invading forces. or turned into mercs to kill the other forces. meaning whites against whites, or blacks with incentive and weapons supplied by invaders to kill whites. it won't be as simple anymore when the enemy is at the door.
United States