Really, utilitas?  You show a Trump supporter's level of understanding or race in America.   That explains plenty.   It is so funny that you should be sticking up for immigrants since your history of posts here points to them as the cause of America's ills.

I work with both of these communities.  They came to this country under entirely different circumstances.  The African-American experience was that of over two centuries of slavery that destroyed the family and then a century of non-voting laboring poor.  The recent Asian groups you refer to weren't slaves or barred from voting when the became citizens.  There were also no laws baring them from attending school or learning to read.