Up until the early 20th century, the Democrats were a socially conservative, states-rights party. Political parties evolve and never stay the same. Look at how the party of Eisenhower and Gerald Ford became a fascist party.^^^
You need to update your history books, Almost Marco. The KKK is now a Republican organization and has been ever since the Nixon campaign started the Southern strategy.
Have you ever been to the United States? What part did you visit before returning home to Brazil?