There's a lot of stuff that goes into this topic and it would take forever to explain it all, so I'm just gonna hit the basics.
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The Confederacy was the southern states where slavery was legal. The south's economy (cotton, tobacco, etc) was very labor intensive and would have failed if slavery was outlawed.
The Republicans used ending slavery as a way to end the stranglehold of the Democrats (also referred to as "Dixie-crats") had on the south.
Democrats were the party of the KKK until at least the 1960s.
Democrats of the 1960s (think LBJ) did more harm to blacks than anything since slavery ended. Due to the way the welfare laws are written, it's better for single moms than for families with the father in the home. Also, the more you breed, the more cash you get rolling in.
Southern Pride is a mixed bag. Liberals claim it's only ever about racism while ignoring the fact that a lot of blacks also have Southern Pride.
NOTE: Hemp was originally outlawed to protect the cotton industry. It could be grown in most of the US, while cotton could only really be grown in the south.
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