They were at an advantage, as they were able to claim the best land before East Coast migrants arrived and had farming experience.
Several reasons.
Saw this crusade as a blessing from God.
Christians would stop fighting themselves.
Christians that would fight would go to heaven or be right with God.
To take back the holy lands, from the Muslims would be a righteous cause.
The Apartheid government of South Africa resulted in the forced removal of 3.5 million black South Africans between 1960 and 1986. This all white government made legal segregation possible in South Africa. This forced millions of individuals to move and started segregated public facilities. During this era, there was very little contact between white and black South Africans.