Most of the southerners believe that slaves are essential for southern trades.
Even though small number of them did not think similarly, majority of The southerners view that the government should not intervene with the issue regarding slavery in the south.
Southern economy was supported mostly by agricultural sectors and they require large number of labor. They argue that freeing the slave would massively increase the cost and reduce states' income.
For starters, some victims would be too scared to prosecute people due to threats or fear of retribution. Many people could go unpunished this way. Another big thing would be that criminals could hurt anyone who could prosecute them, so there wouldn't be a victim that could do it.
He claims that people should be aware that there can be no alliance or plan that can be more sacred than their Union and that they should always be aware that the well-being of the federation should thus always be a part of their own well-being. He stated this in his farewell letter.