Reason for Radical republicans to punish the south
Explanation:
The civil war was started because of the uncompromising variations between the slave and free states. over the power of the national government to prohibit slavery on the territories that were not even formed as states.
The south state wished to assert their authority over the federal government to abolish federal laws that were opposed by them especially the law interfering south's right to keep slaves and take them wherever they wished. This right was opposed ad=nd the south decided to war.