Valuable reminders of white supremacy, erected for the purpose or reminding black people that their place was below that of white people. Very "fine", indeed.
No way. No one in America's slavery past ever even considered 'white supremacy" a thing. They were people who in large numbers came here as indentured servants, apprentices, or who had no opportunity in england/etc and put their all on the line just to get here.
Today's ranchers throughout the West, and in California's agricultural districts, are not "White Supremacists" today, either. They are practical people trying to make something of the resources they have, who need help.
The economic climate created by slavers offloading blacks for sale meant that many people who just wanted to survive economically, had to also buy the cheap labor, just as today's open border politics puts many Americans today in a disadvantaged position of having to use the illegal/cheap labor.
None of this excuses anyone from any kind of oppressive conduct, nor does it mean runaway slaves or workers who find another way to survive are bad people who need to be rounded up and shipped out. We need more people. Our whole economic system is profoundly growth-dependent. If we ever have a declining population we will have a Depression.
Almost every society ever observed with an understanding eye has had privileged and underprivileged classes, more often distinguished by ethnic or cultural or racial lines of "reason", mostly based on who a person is. Today's "liberals" or democrats, or socialists worldwide are no better. Everything is connections and privilege based on political favor or disfavor. China is probably as bad as it has ever been, and the Democratic Party of the USA is in fact, rhetorical offerings aside, deeply influenced by China. Enough to make the whole Russia collusion thing with Trump a seriously laughable ploy.
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You should realize that most black slaves shipped to America were captivated and sold by other black folks, who saw it as an economic convenience for themselves. Just as here in Utah, the Ute Indians had a long-standing practice of capturing Shoshone or Piute root diggers, very peaceable and isolation-loving encampments along basin lakes and rivers all over western Utah and Nevada, and then sold them off in Albuquerque to the Spanish hefes.
For black slaves offloaded into the Colonies or states before 1820, the reason they were slaves brought here was not racial. It was exploitative of inadequately defended villagers. The racial component was not ever legally set out as "blacks will be slaves", even in the United States. There were black slave owners, and Cherokee slave owners. The legal definition of a slave was a person who was sold and paid for legally, per the inexcusable laws of the time.
Brigham Young ended the Ute slave trading by threatening holy war against the Utes, and made friends with the Piutes like Kanosh, and settled some of the natives on good farming lands and taught them the farmjing methods.
You are like many political hucksters, dishonest in the extreme, for unabashedly running out political operations trying to inflame racial issues and differences regardless of the facts, regardless of the real history.
The Constitutional American tradition is the standout exception in all the world and across all human history, for even professing, but also for actually achieving a significant degree of equal protection under the law, and equal rights for all distinctive sorts of persons. Socialist revolutionaries will destroy all that, and like Xi Jin Peng, will set human rights back four millennia, to before the first principles of Mosaic Law required strangers to have rights protected by the resident community.
Because what they care about is not the people, but their power over the people.