Apparently we are experiencing the same sort of splits between different groups of Christians that Europeans experienced in the Middle Ages and in early modern European history. Even in the colonies before the American Revolution, the various factions of Christians were combative with each other. Puritans, Quakers, Catholics, Episcopalians.
Just as Jews and Muslims have split, so are Christians of various groups, yet this fact is rarely acknowledged.
As I have said above, Hilary Clinton is a life-long Methodist. Her husband is a Baptist. President Obama is a member of the United Church of Christ.
It is not valid to say that one is a "Christian" without stating what denomination one belongs to.
I remember seeing a billboard somewhere in Texas or New Mexico with an anti-Roman Catholic message. I'm no fan of the RCs, but this was disgusting, and no doubt paid for by some wigged-out protestant.
It is about time that we acknowledge that the Christian faith is splintered, at least in this country.