I am starting to come around to that view myself. The mythology of America has been dying for some time, and accelerating dramatically in the last few decades. Without that mythology to bind us together, it may be that we are more different than we thought. Arguably the majority of people in the southeast, for example, do not share the same values as people in the northwest. Maybe they should not try.
The problem is that, between natural population growth and the rise of the internet, both the cultural plane and the physical one have largely run out of space. Figurative "midwest zealots" just cannot live their lives ignoring "coastern heathens" even if they'd like to, and viceversa. And so the fights have broken out and will likely continue for a long time.
It does not matter what people in Kentucky think. They do not have the right to an opinion on another person's life decisions. Even if every person in Kentucky, or every person on the planet believed abortion is wrong, that would not impact an individual person's right to an abortion. Abortion is outside the scope of what governments can legitimately legislate, because individuals have sovereign control over their bodies.
The other side says that the fetus is a person with rights that are being trampled. And around and around we go forever. I am personally pro choice but I do understand that this is 100% my own subjective opinion.
It's liberating in a way- I don't need the whole country to subscribe to living like me or holding the same beliefs and that's okay.