Not all missionaries wear white. To which missionaries are you refering?
White is traditionally a sign of purity, cleanliness, and Godliness.
It depends on what religion you are talking about, and what historical period, but missionaries have gone all over the world... of all races, but probably more white.
Missionary work in the Oregon country was not very successful because the Native Americans were very suspicious of the missionaries because of the diseases that were introduced by missionaries and white immigrants.
missionaries
Elijah White in 1842
Elijah White in 1842
They are called the Missionaries of Charity.
George Edward White has written: 'Charles Chapin Tracy' -- subject(s): Biography, Missionaries, Missions
Protestant missionaries. -APEX Learning®️ 2021
Mover theresa established the active and contemplative missionaries of charity sisters. The missionaries of charity brothers and lay missionaries of charity.
Depends on which missionaries in what era.