Was the SC ordnance of secession used as propaganda? The article states that:
“The document, however, omits to mention that the Republican government was committed to the preservation of slavery in the states where it existed. To do so would weaken its effect as propaganda.” The document was intended for southern domestic political consumption–to “fire the southern heart”–to inflame the citizens against the North.” Abraham Lincoln understood what they were about. That is why he referred to the slavery agitation in the South as an “artificial crisis.”
http://www.civilwarcause.com/cutup/scardecs.html