SLAVERY IN NEW YORK CITY
I, for one, am weary of hearing the constant drumbeat about how evil the people of the South were because they owned slaves. Get over slavery.  It was a way of life in almost every society and culture from the beginning of mankind up and until 1800.  Many people in  the North owned slaves.  Many engaged in the slave trade.  So the North fought a war with the South over several issues including slavery.  The North won. That was 155 years ago. All these people blaming the South for all the ills of the black community are ignorant.  They need to shut up and quit rubbing salt in the wounds.
The following is from the New York City Public Library web site:  https://www.nypl.org/blog

With the aggressive increase in the slave trade and the expansion of the city, an official slave market opened in 1711 by the East River on Wall Street between Pearl and Water Streets. By 1730, 42 percent of the population owned slaves, a higher percentage than in any other city in the country except Charleston, South Carolina. The enslaved population—ranged between 15 and 20 percent of the total population. The slave market on  Wall Street  closed in 1762 but men, women, and children continued to be bought and sold throughout the city.

After the abolition of slavery, which became effective on July 4, 1827, New York’s shameful history of discrimination, racism, rigid segregation, and anti-black violence continued. By the 1850s, the city was dominating the illegal international slave trade to the American South, Brazil, and Cuba. New York benefited much from slavery and the slave trade: southern cotton and sugar sailed to Europe from its harbor. Banks, insurance companies—among them Aetna, JP Morgan Chase, and New York Life—and lawyers made a brisk business with slaveholders and slave ship owners. Traders and builders outfitted slave ships. 

In this northern city, pro-Confederate sentiment ran high, and in July 1863, during the infamous Draft Riots 11 black men were lynched, tortured, mutilated, some hung from lampposts and burned. About 100 people (mostly blacks) were killed in Manhattan and Brooklyn, 100 buildings were destroyed, the property damage was high. The brutal episode changed the demographics of black New York. From 12,472 in 1860, the black population decreased to 9,943 in 1865.