I understand. You found paradise in America. You had a good trade, you made a good living. The police protected you and there were courts of law. So you didn’t need a friend like me. Now you come and say “Don Corleone, give me justice.” But you don’t ask with respect. You don’t offer friendship. You don’t even think to call me “Godfather.” You come into my house on the day my daughter is to be married and you ask me to do murder - for money.

No Sicilian can ever refuse a request on his daughter’s wedding day.

Some of the 70s in film

"I’ll make him an offer he can’t refuse."