What do you think about states in the United States filing to secede following Pres. Obama's re-election?

I have said before that the southern states seem to want to be the Confederates States more than the United States yet ironically so many people in those states wave their American flags high and accuse liberals of being unAmerican. Yet here those states are wanting to defect the nation. It seem so contradictary to me. It isn’t only the southern states who have submitted they want to secede, but it is mostly red states.

Should Obama even respond?

Should we let the states who petitioned for it go?

How does that even work? What actually has to happen for a state to secede? What is the procedure?