It's inappropriate to insult your grandchild's significant other.
Bob is suspicious of his grandson Chuck's girlfriend who is from a different country.
Bob wants to express his concern to Chuck.
Bob talks about his concern, but decides to give Chuck's girlfriend a chance and invites them both over for dinner.
Bob makes a racist comment about Chuck's girlfriend during thanksgiving.
Bob learns that he has a lot in common which Chuck's girlfriend, and they become close.
Bob and Chuck and nearly come to blows and Chuck leaves in anger.