Who said "Everyone who isn't us is an enemy"?

This quote is attributed to Cersei Lannister.

Everyone who isn't us is an enemy - Cersei Lannister

"Everyone who isn't us is an enemy"

Cersei Lannister

Character in A Game of Thrones

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"I choose violence."

"Mercy is the privilege of the strong."

"The things we love destroy us."

"In the game of thrones, you win or you die."