Sorry, but I don't believe you. First, you contradict yourself throughout the story. Second, the word - miscegenation - wasn't in anyone's lexicon back then, with your grandmother. You inserted that word for your own emphasis. 
Lastly, you never researched history. Lee never owned slaves. He was a Union officer who switched solely for the purpose of defending Virginia, which at the time had 60,000 free blacks, the highest amount of any state. 
I see you worked for Hillary. Figures...