Red states secede. Is war inevitable?

Yeah, there are quite a few parallels between this hypothetical scenario and the Brexit situation currently being discussed in the Irish unification thread. However, even if Texas wanted to rejoin, the blue states could just veto it. What is Texas going to do, start a war for unification? How ironic that would be in the context of the Civil War.

After more rumination, I am in complete agreement with you on this particular detail.