The main goal of the European missionaries for travelling to the rain forests of Central Africa was to spread the religion of Christianity among the poor people living there. The working class of the region was the main target of the missionaries. They tried to bring spiritual enlightenment and salvation to the workers and their families. The missionaries also brought with them the western style of education to central africa. They also tried to teach the importance of monogamy among the people of this region. It was not always easy for the missionaries as they were often threatened by the constant warfare among the Africans.
Depends. What war are you talking about? If it's WW1, then it's because everyone was stupid at the time and thought their enemies did it and one thing led to another.
Some similarities included: -polytheism, the believe in many gods, - The God of Sun had a special place in both religions - The God of Water/Rain also had a special place in both religions.