Why did European colonists tolerate the way the Congo's native residents were treated?

European colonists tolerated the mistreatment of the Congo's native residents primarily due to their economic interests and exploitation of resources. The demand for rubber and other raw materials created a ruthless system of forced labor, where the local population was subjected to violence and harsh conditions. Additionally, colonial attitudes of racial superiority dehumanized the native residents, allowing colonists to justify their actions. Ultimately, the pursuit of profit overshadowed any moral considerations regarding the welfare of the Congolese people.