Well, before they lost the Civil War they believed that "states rights" should apply to the administration of slavery but not the non-administration of slavery (the Fugitive Slave Laws). The hypocrisy runs deep.

Such “beliefs” are cooked up by people who are mostly self-serving and insincere. We’d call them “political operatives” today I guess.

Unfortunately other people hear the ideas, internalize them, and repeat them, without recognizing any contradictions.

Just call them racist. They don't like that

Don’t think they care that much about that anymore.