how does lee use scouts innocenc as a vehicle to explain atticus' attitude toward aaferican americans?

There are a number of places that Scout' innocence is used in this way. Atticus has a quality of explaining the ugly parts of human nature clear enough for Scout to understand yet with a demeanour that respects her intelligence. I love his simple statement, “It’s not okay to hate anybody.”

Another one is,

"As you grow older you’ll see white men cheat black men every day of your life, but let me tell you something and don’t you forget it— whenever a white man does that to a black man, no matter who he is, how rich he is, of how fine a family he comes from, that white man is trash.”--Atticus