Southern states didn’t want US states which did not permit slavery to be able to ban slavery. Personal liberty laws, which delineated the procedures that slave catchers had to use in northern states were held unconstitutional, denying self rule to US states which banned slavery.
Slave catchers would, given their inability to get cooperation by state officials, support in the north, to kidnap poor whites, get false papers, and sell the kidnapped whites as slaves to cooperative slave owners such as R.E. Lee. That was one reason why slaves at Arlington over time became more and more white. The other was of course the raping of slaves by their putative masters.
The first is selective misapplication of a two-sided condition. Like smoking bans...the ban limits freedom of the smoker while giving freedom to non-smokers. My point remains the same and remains valid. Southernphobes today try to portray themselves as having some sort of moral high ground by saying or by pretending that the WBTS was fought to free slaves, which is not only wrong it would be hypocritical if true...given that the same war prevented Southerners from being free to decide their political fate.
The second comment would be hysterical if it wasn’t so revealing. I defy you to show any evidence R.E. Lee took whites as slaves. Seriously, take your meds.