It did no such thing.
It prevented all the slave "property" in all the southern states to be seized without "due process", but they did it anyway.
It did no such thing.
They simply ignored the Constitution when it suited their interests, and demanded strict adherence to it when that suited their interests.
The truly sad thing is that you obviously believe that. And not amount of rational discussion is ever going to dissuade yourself from your biased opinions.
Not interested in your desire to pretend otherwise. It's in plain English, and there is no risk of misunderstanding unless you just want to misunderstand.