So in other words the Confederates felt that the government was no longer responsive to their needs as a people?
I'm not sure that the need to get one's way in every matter is a legitimate need that a government must fulfill. Republican government presupposes a degree of political maturity and restraint which the Confederates lacked in 1860-61.
The South "felt the US was no longer responsive to their needs as a people"?
Is this an episode of Oprah?
The Constitution is about law, not feelings.
The US guaranteed the rights of its Southern citizens to the fullest extent of the law.