That's been true since before our country was settled by the English.
To understand, you should read the book Albion's Seed or The Cousins Wars, which both describe how different groups from England that had the same "we don't like you" problem over there came here and arrived here and settled together again in their little groups/tribes. Northeast vs South.
There was an English Civil War long before our war of Northern Aggression on our shores, you know.
We didn't much like one another then, and "there's nothing new under the sun."
‘’war of Northern Aggression’’?
REALLY? so you’re a Reb?
Well, guess again Reb. It was the SOUTH, the Confederacy, that started the damn war!