If the church is the body, and if the foot is injured and the rest of the body suffers?

Then doesn't the mind of the church know when the church raises its hands in violence? Why doesn't the rest of the body control the offending member? For instance, Christians murdering innocent people in Uganda. If the church is one body then surely the collective mind of the body knows when its hand commits murder, so why doesn't the mind stop the hand of violence instead of claiming the hand does not belong to the body?