So, it's your belief that the US has not progressed in its views of racial equality since the 1800s? Seems like there are a large number of racially diverse members of Congress, in the Justice Department, State Department, Department of Defense, etc, etc, etc. Are you seriously saying that people of Asian ancestry in government are today (not the 1800s) still perpetuating policies of violence against the Chinese?
Saying a given behavior or prejudice "goes back to 1887" is a shrewd way of saying the problem has been part of the culture for so long that the people are unable to evolve beyond their hatred.
is that what you're saying?
There has been a number of laws enacted since the 19th Century that have curbed discrimination and/or racist behavior. However, although generalizations of racism, bigotry, and/or discrimination would be inaccurate, it would also be inaccurate to say the US empire or any other nation, for that matter, to claim such attitudes does not exist, within their respective populations.
Even in countries that are racially homogeneous, it would not beyond the realm of possibility that ethnocentric attitudes exist, against other races living outside their borders. As it pertains to today's US empire, there are millions of good people, who do not judge or display bigoted attitudes to their fellow men and women; however, there are millions of others that at least harbor those attitudes and thousands, of that group, who act on those beliefs to the extent they can skirt the prevailing laws.
As you are an astute student of history, you should already know hatreds, especially racial, ethnic, color, religious, etc. do not die over time. Similar to the first law of thermodynamics, emotions can not be created or destroyed. Once the manifestation of hate exists, the best society can achieve is to create laws, to prevent those emotions, from translating to mal-benevolent actions. Unfortunately, laws can only do so much, as seen in the prevention of crimes.
The only reason why the US empire has and will forever have a race problem is for the simple fact, of its heterogenous population. No heterogenous empire or nation has ever survived the test of time. If fact, one could argue, the fall, of the many nations and empires this planet has ever seen, was heavily influenced due to its multiracial/multiethnic population, amongst other factors.
Case-in-point, the Hawaiian Kingdom was a multiracial/multiethnic nation. Although it could not be said that the aboriginal Hawaiians were not ethnocentric, they were far less racist than the Americans of their era. The only mistake the Hawaiian Kingdom made was giving trust, to those Hawaiian nationals, of American decent. In fact, it can be substantially argued the racist behaviors that exist in Hawaii today are a direct result, of the American descended plantation owners living in Hawaii that made sure the Republican White population would continue to politically and economically dominate Hawaii, until the next big mistake in 1959, that allowed the other cheek, of the same buttock, the Democrats, to dominate till this day.