In summation: Christian missionaries go over to Africa, and begin converting native Africans to Christianity, some of whom become preachers themselves.

Many of them stir up the AIDS/condom rhetoric of the Catholic Church and other religious communities, and also they bring out their pet topic of homosexuality and its evils. That leads to things like this (A Ugandan preacher explains "homosexual practices"). And in turn, speeches like that led to calls in 2009 to pass a law authorizing the execution of gays, coincidentally following visits by anti-gay preachers. The bill, as you can see from the article, fortunately never passed. But note that they still want to imprison gays, and probably withdrew the death penalty because western nations claimed they would withdraw aid.

But if you think that's all... It's not even the tip of the iceberg:

Certain churches or townspeople accuse others, often kids, of being witches. Their families are extorted for money for exorcisms. These 'witches' are beaten and abused

Or they are burned. (I suggest you listen to Hemant, the video is NSFW and NSFL, and extremely upsetting).

And even those who condemn these witch burnings still insist witchcraft is real and distribute literature claiming that people's suffering comes from witchcraft.