Charles Blow has a similar take in an Op-Ed piece that he wrote which is worth reading.
The Other Inconvenient Truth
An excerpt:
"But in the modern age one party has operated with the ethos of racial inclusion and with an eye on celebrating varied forms of diversity, and the other has at times appealed directly to the racially intolerant by providing quiet sufferance.
It is possible to trace this devil’s dance back to the passage of the Civil Rights Act of 1964 and the emergence of Richard Nixon. After the passage of the act, the Republican Party, the party of Lincoln to which black people felt considerable fealty, turned on those people and stabbed them in the back."
"In 1970, Nixon’s political strategist Kevin Phillips told The New York Times, “The more Negroes who register as Democrats in the South, the sooner the Negrophobe whites will quit the Democrats and become Republicans.”