Originally Posted by
Adam Strange
Every mixed culture on Earth has a group at the bottom of society. In Nazi Germany, it was Jews. In the States, it's black Americans.
This "assignment of lesser quality" to a group can be difficult to overcome if that group sets itself apart, intentionally or not, from the main group, by dress, habits, skin color, height, or anything else that is recognizable in 40 milliseconds.
Remedies include having legally required, positive representations of the out-group, so the members of the group, if they want to assimilate, have positive role models. That has happened in the States to a great extent in my lifetime, but we're still not at the point where people don't "see" color. Positive images of blacks doing normal things for normal reasons helps to sweep away bad stereotypes, and the US military, in focusing on outcomes rather than exclusions, has led the way here. Capitalism, in searching to fill every market niche, has eagerly followed.
Another remedy is intermarriage, but this takes longer to fully homogenize if not legally dictated.
There are many out-groups which choose to be out-groups, like orthodox Jews and the Amish, but they want to be different.