I took a closer look at claim #1.
"White Americans use drugs five times more than black Americans, yet black Americans receive prison sentences for drug offences at ten times the rate of white Americans."
Regardless of whether you find a cite for this, I don't actually doubt the veracity of this claim, at least not in more general terms. I wouldn't be at all surprised to find that white people use more drugs than black people. But it's a very unqualified claim. In particular, what kind of drugs are being used, and in what circumstances, is fairly important.
I don't think there's any doubt that there are far more black people in jail for drug-related charges, on a per-capita basis, than there are white people. And I don't think there's any doubt that it is far disproportionate to the rates of actual illegal drug use that occurs. What I think is missing is the types of drugs being used, and where/how those drugs are being used... as well as the complicating factors of racism in the justice system.
Even if all else was equal, I think that a black person is more likely to get pulled over or stopped by the police. That in turn allows the police more opportunity to discover the illegal drugs.
When you add that to the fact that the sentences for different substances vary, and that the rates of usage for those substances differ by income level, and that income is correlated with race... Is it any wonder that black people are getting the short end of the justice stick?