What insult? And are you saying that they dissolved the union, raised an army and started a war because their feelings were hurt?
Robert E. Lee's father & uncle, were very much a part of that commitment. Daniel Webster certainly understood it, in supporting the compromise of 1850 (see Daniel Webster Address).
Sadly, the compromise, so eloquently supported by Webster, did not stop the endless sniping against the honorable intentions of the Southern partners. It is not the subjects of that sniping that are as important as the breach of the essential mutual respect, which made the American compact possible.