Exactly. WWII was never about ending racism, although one would be at pains to argue racism hasn’t receded. Racism has gone so far backwards in 60 years that there are cases of reverse racism. Europe was so gult-ridden for having given birth to Hitler that it opened up its borders to whatever "other" wanted to come. The result? 20 Million Muslim immigrants flooded Europe within thirty years. Countries let them get away with murder for fear of being labeled 'racist.'
But the United States was drawn into the second world war. Germany torpedoing our commercial ships, for example, was a factor in our being drawn in. It wasn’t as if the American President woke up one morning and said, “Hey, the rest of the world is trying to kill each other, let’s join in and see if we can get some control, power or big money.”