Go away, please.
Redneck has a point....the great push for emancipation and support for the “escape” systems such as the underground railroad came in large part from churches and religious minded folk...not from idealistic atheists!
The atheists( and lip service Christian money powers) who opposed the south’s bid for freedom were the money’ed interests of NYC and Boston who feared loss of revenue from the South (which had sought, even before the war, more direct markets for their goods overseas, bypassing the ports and manufacturing centers of the North!).
As what happens in much of history when money,politics, and religion find themselves in a threesome lock step waltz, there was a devil to pay...in this case a national Civil War!