Why? Because back then people from all walks of life were forced to mingle via the military, those whom hated other races were now exposed to each person as an individual. There was good and bad in each, any, and all; same as everywhere else. There were young men, 21 to 25 or so back in each's neighborhood, now able to show younger members of their neighborhood a different approach to life, an approach from a more toleratable level. These examples are now lost to minority neighborhoods, and you can see the results. Comments? There are other reasons but I am out the door to go earn my daily bread, more later.