Response and Two Questions for "Death of a King's Horseman"

Response: Contrast Between the First Two Acts

 The first act of "Death of a King's Horseman" shows the tribal customs as everything to the natives. If Elesin does not sacrifice himself the whole world will be thrown out of balance. The people around him are doing everything to make sure he follows through. This includes Iyaloja giving up her daughter for marriage just to make sure Elesin is happy. In this first act the reader is also convinced that  Elesin's sacrifice is extremely important. Then the author takes us to the perspective of a British citizen in the second act. From the point of view of  Pilkings the once important sacrifice is ridiculed as some pagan act. This shows the disconnect between the natives and the British. This disconnect is also furthered in the costumes of Pilkings and his wife. The officer, a native, who comes to see them is spooked by this as it seems to be disrespecting the dead even though he is a converted Muslim. While Pilkings views these cotumes as funny. Even the tension between Pilkings and Elesin shows the disconnect. Elesin is mad at Pilkings because he allowed Elesin's son to be sent to medical school. This act would be seen as extremely generous to us westerners, but the action is views as despicable by some natives because it took Elesins eldest son away from him. The contrast between the first two acts set up the tension throughout the play as the two parties, Pilkings and Elsein, have fundamental differences in thought process's 

Questions: 

1.  How do the tribal customs and British laws interact in everyday life?

2. What are Elesin's true motives for marrying someone so close to death?