The First 13th Amendment

What exactly is the first 13th amendment?  This amendment was one that guaranteed that the government would not and could not interfere in issues of domestic institutions within the state.  This amendment had passed through congress and the senate and was only awaiting state approval to be sent to the newly elected president, Abraham Lincoln, who openly approved this amendment.  If the amendment was passed it would guarantee slavery forever however, after the firing on Fort Sumter the first 13th amendment was cancelled by Lincoln's call for 75,000 volunteers to invade the South.  So, how is it that the "Pious Northerners" who invaded the "Wicked, Racist South" were for an amendment that was pro-slavery? well once again we see that slavery was not the issue of the "Civil War".  Lincoln himself said :"My paramount object in this struggle is to save the Union and it is not either to destroy or save slavery.  If I could save the Union without freeing any slave I would do it...".  But why did the North want to "save the Union"? Simply because 90% of the industrial North's revenues came through the agricultural South, through high taxes and tariffs such as the Morril tariff, which impoverished the South.  This war wasn't a "Civil War", for the South it was a war for Southern independence from a tyrannical and unequal Union and for the North it was a war to prevent Southern independence because if the South seceded it would cause an economic collapse in the North and economic prosperity for the South.  And so we see that if slavery had been the issue the South would not have seceded as the 13th amendment would have assured them the solution on that score.  So the first 13th amendment provides shattering, documentary evidence against the cherished belief of a pious invasion to free the slaves.