On October 16th, 1859, John Brown raided a federal arsenal in Harpers Ferry, Virgina, in hopes of starting a slave revolt. Brown was captured two days later and tried and put to death for treason.
Northerners showed respect to John Brown because he showed great dignity during his trial, and even wrong a song about him.
Southerners were furious that the North was praising a man who started a slave revolt. They saw it as an attack on their livelihood.