Here's a White guy about to stab a Black guy in the chest with an American Flag.

[NuclearDem]

153. Now you're just doing it deliberately.

Here, I'll write in nice, short phrases, so you don't get confused:

A major cause of North-South tension was the issue of slavery.

The South wanted to keep their slaves, and to keep having slaveholding states admitted to the Union.

The main reason the Union went to war was to force the rebels back into the Union.

The South didn't stop holding slaves until the Union forced a surrender and occupied them.

Slavery was a major cause of the war. It fueled tensions. It was not the reason the Union fought the war. Had slavery not existed in the South, there would have been no war, because no North-South tensions over slave/free state admission would have existed.

I cannot possibly make this any clearer to you. Anything after this, and I'll just assume you're being deliberately dishonest.