How did Abraham Lincoln's presidential win in 1860 further divide the North and South?

Lincoln was very strongly against slavery, and slavery was a favoured view at that time. People in the South were upset about him winning because they liked slavery. However the North wanted to abolish slavery.

The Southern states threatened to secede should Abraham Lincoln be elected president (which he was) because they knew he was pro-Union and supported the abolition of slavery, the very institution the South was built on.