TFA Chapter 24- Doug

By this point in the book, the missionaries have committed a large number of atrocities that have not only disrespected the people of Umofia, but have also humiliated them. Okonkwo's return is the not what he expected, but as he learns what has happened during his years of exile, he becomes increasingly furious. We feel his anger build throughout the chapter as he describes what he "would have done" and what he will do if Umofia decides to not go to war. He however, cannot control himself and therefore kills one of the messengers at the market meeting. Was it his anger towards the fact that he had been absent for so long that drove him to committing murder? Or was it his anger towards the people of Umofia that he assumed would not go to war?