 Apu takes Lisa through a secret passageway hidden behind the cooler section assigned to non @-@ alcoholic beer leading to the Kwik @-@ E @-@ Mart roof where they meet Paul and Linda McCartney . The McCartneys explain that they are old friends of Apu from Paul 's days in India , and discuss their interest in animal rights . After a brief discussion , Apu asks Lisa what happened at home that made her upset . She reveals everything and while he understands , Apu warns Lisa that forcing others to accept her views can do a lot more harm than good . She is committed once more to vegetarianism , but realizes that she should tolerate those who disagree with her views . 
