Final answer:
British missionary leaders believed that African religious movements led Christians astray by promoting false beliefs, as they incorporated traditional African beliefs and practices into Christian worship.
Step-by-step explanation:
British missionary leaders argued that African religious movements, unlike 'true Christian churches,' did not convert the heathen but led Christians astray by promoting false beliefs. This concern came about as African Christianity sometimes retained elements of traditional African beliefs and practices, which some missionaries viewed as incompatible with their interpretation of Christianity. The independent African churches, established as a push against European colonial missionary models, aimed to have Africans in charge of their church missions, asserting both religious and political independence. These movements often resulted in an Africanized form of Christianity that incorporated traditional local beliefs. Missionaries feared these movements diverged from orthodox Christianity and were thus promoting what they saw as false beliefs.