They both dealt with great hardships since the dawn of the Republic. Southern plantation owners held the black community in enslavement, whereas the the greedy American settlers stole Indians’ land. After the Civil War, the slaves were free, and the remaining tribes were being placed in reservations.
Because president abraham lincoln abolished slavery. He didn't want slavery to exist anymore because he was poor growing up and saw what happend with the slaves and even met Sojourner Truth.