Citation needed. Not because I don't believe you, but because I don't know what you're talking about. We had laws preventing anyone but white men from owning land prior to the civil war, but I don't think you're talking about that. If you're poking at Jim Crow or Black Codes in southern states, I'll point you right back to my example of the Japanese during WWII. We didn't just have racial bias against the Japanese, we ran them out of their homes and put them in internment camps. How on Earth did they recover from that?
Nope. A case cannot be made. Not only that, a case should not be made. Excuses are the reason people stay poor. Trust me, I'm related to some never-ending excuses.