Explain the impact slave revolts had on attitudes toward slavery both for and against?

The slave revolts in what would become Haiti created the
second independent republic in the Americas and created panic across the slaveholding
world of the Americas.  It undermined slavery in the Carribean and with slave revolts in
places like Jamaica undermined slavery in the British
Empire.

Slave revolts in the U.S. such as the rebellion of
Nat Turner, tended to harden positions among whites in defense of slavery, and lead to
suppression of abolitionist expression in the South, and in the North it dissuaded some
against abolition, as such revolts played into the hands of slave apologists about the
natural "savagery" of blacks, while those who were militant in the abollition movement
regarded such revolts as the natural instincts of humans yearning to be
free.

However while slaves seeking to runaway invoked
sympathy toward abolition, slave violence while understandable from the perspective of
today, tended to horrify whites and could be manipulated to bring disrepute to
abolitionist efforts in the white population. Essentially the argument was that the end
of slavery would bring about racial violence and race
war.

Militias were much more organized in the South than
the North, for fear of slave revolts. This is particularly the case in states that had a
large black minority or in the case of South Carolina, a black
majority.

Black abolitionists, particularly those who had
spent some time in slavery had a different perspective.