The central idea is that the white people are worse than natives insofar that it may seem like the Natives are brutal savages, but it is actually the colonists who are worse because they "poison the heart" while the natives only "scalp". He explains that he tried and failed and is sorry that soon the Natives will be just like the White men. Expand this into two paragraphs and add a bit more quotes.
By being hard to do the work because it does get hot out when doing that kind of job
The mailman is different depending on which country you live in but in USA it is 18 <span />
Doves and hawks
The doves were those who were opposed to the Vietnam war. The prolonged war had caused a lot of protests and opposition from these groups of leaders and their supporters and the families of those soldiers involved in the war.
The hawks on the other side were those who supported the continuation of the war.