You did not read the linked article.

And also if you read Michelle Alexander's the new jim crow, you'll realize that even de-jure de-segregation has mostly been circumvented / nullified by drug laws. 1 in 5 black men will spend some time in prison in the US, and slavery is still legal in the US under the guise of drug-based imprisonment.

The article gets more into it, but the material wealth divide was completely unaffected by the civil rights "wins", and poverty is still growing along color lines. I'll post a few of these below:

• The US currently operates a system of slave labor camps, including at least 54 prison farms involved in agricultural slave labor. Outside of agricultural slavery, Federal Prison Industries operates a multi-billion dollar industry with ~ 52 prison factories , where prisoners produce furniture, clothing, circuit boards, products for the military, computer aided design services, call center support for private companies. 1, 2, 3
• The US has the highest incarceration rates in the world. Even individual US states outrank all other countries.
• Ramping up since the 1980s, the term prison–industrial complex is used to attribute the rapid expansion of the US inmate population to the political influence of private prison companies and businesses that supply goods and services to government prison agencies. Such groups include corporations that contract prison labor, construction companies, surveillance technology vendors, companies that operate prison food services and medical facilities, private probation companies, lawyers, and lobby groups that represent them. Activist groups such as the National Organization for the Reform of Marijuana Laws (NORML) have argued that the prison-industrial complex is perpetuating a flawed belief that imprisonment is an effective solution to social problems such as homelessness, unemployment, drug addiction, mental illness, and illiteracy. 1
• The War On Drugs, a policy of arrest and imprisonment targeting minorities, first initiated by Nixon, has over the years created a monstrous system of mass incarceration, resulting in the imprisonment of 1.5 million people each year, with the US having the most prisoners per capita of any nation. One in five black Americans will spend time behind bars due to drug laws. The war has created a permanent underclass of impoverished people who have few educational or job opportunities as a result of being punished for drug offenses, in a vicious cycle of oppression. 1, 2
• In the present day, ICE (U.S._Immigration_and_Customs_Enforcement), the police tasked with immigration enforcement, operates over 200 prison camps, housing over 31,000 undocumented people deemed "aliens", 20,000 of which have no criminal convictions, in the US system of immigration detention. The camps include forced labor (often with contracts from private companies), poor conditions, lack of rights (since the undocumented aren't considered citizens), and forced deportations, often splitting up families. Detainees are often held for a year without trial, with antiquated court procedures pushing back court dates for months, encouraging many to accept immediate deportation in the hopes of being able to return faster than the court can reach a decision, but forfeiting legal status, in a cruel system of coercion. 1, 2
• The Obama era was one of the greatest decreases in working class and black wealth, 2 in history: home equity decreased by ~$17k between 2007 and 2016. His housing policies led to millions losing their homes. While Wall street banks recieved $29 Trillion in bailouts, $75 Billion in relief was set aside for housing foreclosures and mortgage assistance. Instead of being paid to families, this was paid to mortgage servicers, and the services found ways to pocket the money and continue foreclosures: by the end of the program, less than 20% of the funds were used, and most had dropped out of the program due to foreclosures. The Obama administration refused to prosecute the fraud, or any of those responsible for the 2008 financial crisis.