No. Southrons have never ventured far into the North -- it's not hospitable territory to them, and our bonds of loyalty run deep -- and most Westerosi call the gods "The Old Gods and the New." They coexist, as far as it goes. There's not much to keep anyone from worshipping all of them. There's also not much to keep someone who worships the Seven from thinking that someone who worships the Old Gods is a savage, or to keep a Northerner from thinking that someone who holds to the Seven is a southron fool.
But there was the Faith Militant, long ago. The North is one of seven kingdoms, but it wasn't always; it used to stand alone. About three hundred years ago, a Valyrian man, a dragonlord named Aegon Targaryen, came from his home on Dragonstone and conquered five of them with his dragon Balerion the Black Dread and his sisters' dragons, Meraxes and Vhagar. My ancestor, Torrhen Stark, bent the knee to him, so the North was never attacked, and we were allowed some of our ancestral rights.
The Targaryens adopted the Faith of the Seven, but they practiced... well, they often married brother to sister. The Faith didn't like that. The Faith Militant were those who fought against the crown for a while because of it.
in which Aegon Targaryen talks about Aegon Targaryen without knowing that he too is Aegon Targaryen.
But there was the Faith Militant, long ago. The North is one of seven kingdoms, but it wasn't always; it used to stand alone. About three hundred years ago, a Valyrian man, a dragonlord named Aegon Targaryen, came from his home on Dragonstone and conquered five of them with his dragon Balerion the Black Dread and his sisters' dragons, Meraxes and Vhagar. My ancestor, Torrhen Stark, bent the knee to him, so the North was never attacked, and we were allowed some of our ancestral rights.
The Targaryens adopted the Faith of the Seven, but they practiced... well, they often married brother to sister. The Faith didn't like that. The Faith Militant were those who fought against the crown for a while because of it.