Because the Northerners knew that as Americans, the South had the right to be sovereign, and it certainly would've saved a lot of lives on both sides. The Jews in power in the North obviously opposed this because they would've lost power and influence over the brave white men of the South, making it harder to infiltrate their governments in order to bring about this new world order they've been working to build for ages. They wanted many to die, and just as the blood of Christ is upon their hands, so will the White man's blood be.