[Nepeta]

He's not one of us. It doesn't matter where he was born, or where he grew up, he's not one of us. He cannot understand Americans because what he is is so alien to what Americans are.

He doesn't understand why the rest of us have a gaping hole in our hearts because of that Black Day. For him, it was just a sign of America's malevolence coming home to roost.

[griswold3]

“He’s not one of us.”
Explains everything.