I fully understand your point about the Thomas Sowells and Walter Williamses, but, Weisshaupt, if you don't know that's what you're dealing with, then you just don't know. The author, Butterworth, demonstrated that with having the Black man in his example revert to type -- "you all Whities jest ain't to be trusted; racists, RACISTS". He'd have done better to have us think about it by showing the man as keeping his dignity, and his racism in check, but he had a bigger point, don't you think?
The man was a well known friend, and he DID KNOW. You might treat him like that in front of the crowd, but you had to sure as hell visit him in his home and tell him you said it to give him cover - because you DO have need of him after all. Of course after reverting to type, maybe you couldn't trust him after all. The point here seems to be "you can't trust them, ever" because the blood is going to be thicker between those of the same skin color and I think that is a bad point to take away. I lived in Harlem. I saw it all, the good and the bad, and I assure both are there.
Any time you use force to substitute your opinions for another's, be it on race or large sodas its a bad thing. I am probably border-line aspergers, I don't read facial expressions well, and I am often a bad judge of character and motives because of it, but even I can identify the problem-child entitled racist/elitist lefty mindset within a few minutes of being with them. I don't think identification of real threats will be difficult. Leftists just don't understand liberty, or individuality- the concepts literally are outside their ability to comprehend. They can't fake it. Their need for self righteous affirmation and group acceptance is too strong. They NEED to be the "cool kids" and they will identify themselves that way every time.
This may end up looking like a race war, but it really isn't. I could go find a bus of white folks that would require those ankle collars and chemical castration too. This is a battle between a primitive, barbaric and communistic tribal culture against a modern, individualistic one. Blacks predominate in one culture because the left exploited the history to give them an alibi for failure as Eric Hoffer asserted , and a group to hate for it. Or as Richard Bach said "Argue your limitations and they are yours"
The final bit is the real thing - you can't live with those who refuse to live and let live. They are the enemy. Be they White, Black, Brown, red, yellow or blue.