Well because African-Americans aren't Mexicans. They aren't Central Americans. They aren't Cubans. And they sure aren't immigrants. Blacks and Hispanics have radically different interests.
Immigrants drive blacks out of blue-collar jobs and drive down wages in general.
They are shoving blacks from political power across Southern California. Amusingly, Democratic Congressgorgon Maxine Waters now represents a district that has a Hispanic majority. Riots provide an acid test of assumptions about minority solidarity. The 1991 riot in Washington D.C.'s Mt. Pleasant district began when drunken Salvadoran men resisted the dishonor of being arrested by a black woman police officer. Although the immigrants began the rioting, African-American youth quickly poured into the neighborhood and looted immigrant stores.