You know how (if you were the oldest child in your family) your mother and father always yelled at you for not setting a better example for your younger siblings? It’s kind of like that. We are supposed to be a beacon of Emes, of morality, of chessed, of
G-dliness to the rest of the world. That’s why when a Jew does something terrible, it ALWAYS makes the front page. Much as they hate us, even the goyim hold us to a higher standard.