So why not vote against it? Many bad bills are killed. Why not vote against it, or threaten to vote against it, or filibuster? Why allow the bill to become law?
Because the promotion of slavery was the issue, and that shameful truth was so embarrassing that southern partisans see the need to muddy the water, even 150 years later.
Slavery had slowed the growth of the south, so that no immigrant wanted to go there, where he would compete with slave labor. Slavery depended on keeping slaves ignorant, so no modern industry, no modern farm methods were possible. Slavery put the South on a path to the 7th Century, on a par with what would have happened if they had converted to Islam.
But you can't bring yourself to do anything except issue your senseless ad hominum attacks on everything Southern.
I see that fewer people here respond to your predictable tripe, so I am thinking of joining that group.