Question

教父2中麦克为什么一定要杀他的brother？

因为背叛和知道太多秘密？

Answer 1

Micheal掐着Fredo的脖子说“I know it was you,fredo,you broke my heart”，这里Michael得知是Fredo勾结外人应该是从party一开始的时候,Fredo向其他客人卖弄时说:"是强尼(罗斯的手下)告诉我的,他曾带我来此,百闻不如一见,是吧?没有一个罗斯的人能像强尼一样,这么了解此地呀!"而这之前,Fredo居然假装与强尼初次见面,这才使得Michael了解到家族中的叛徒就是Fredo.
如果大家还有印象的话,应该不会忘了The Godfather1中,Michael去和Moe Greene谈生意时,曾嘱咐过Fredo:"Fredo -- you're my older brother, and I love you. But don't ever take sides with anyone against the Family again. Ever."

Fredo---Michael曾经认为生性并不聪明但却深爱家族的人,他的亲兄弟,却一而再,再而三地勾结外人,使家族一度差点瓦解....
So what can Michael do....As a Godfather?.....
Fredo broke Michael's heart again and again.And he would destroy the Corleone Family sooner or later,if didn't let him rest...
But as a little brother or a ordinary man.....
Michael was so sorrow.....that he penanced with tears when he was old."I killed my mother's son....I killed my father's son.."

Answer 2

因为他哥不想听麦克的话，他认为麦克总是使唤他，这就像皇帝和大臣一样，大臣认为自己权利小，你说做皇帝的放心吗。他哥又要害他

Answer 3

我认为主要是因为背叛，还记得老教父是怎么被枪击的吗？家族中不允许有让外人知道的不和谐和不团结。