Their goal was to make the poor whites feel superior to the blacks simply because they were white. 
I lol'd and stopped reading there. People, a lot of the times, claim Whites weren't racist against Blacks until they wanted them to stay oppressed.
People also say that people weren't racist until the 1600's or so.
That's false.
The first explorers in East Africa wrote that they were shocked by the nudity, paganism, cannibalism, and poverty of the natives. Some claimed Blacks had the nature "of wild animals... most of them go naked... the child does not know his father, and they eat people." Another claimed they had a natural sense of rhythm so that if a Black "were to fall from heaven to earth he would beat time as he goes down." A few even wrote books and made paintings of Africans with over-sized sex organs.
Familiar? Maybe, but these examples are not from 19th Century European colonialists or KKK hate literature. They come from the Muslim Arabs who first entered Black Africa over 1,200 years ago (in the 700s), as detailed in Bernard Lewis’s 1990 book, Race and Slavery in the Middle East.
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"If you worship your enemy, you are defeated.
If you adopt your enemy's religion you are enslaved.
If you breed with your enemy you are destroyed."
-Polydoros