And, like it or not, persecution of minorities is a very real problem in conservative Muslim countries. Does Shariah law say anything about persecuting Christians? I honestly don't know enough to answer that. I do know that conservative Muslim societies tend both to follow Shariah law strictly and persecute Christians, so even if it isn't causation, it is correlation.
Edit: all of which btw did have atleast one african answer, but had lost too much time allready. Not the first time this happened in a quiz like this, getting stuck thinking it has to meet certain extra requirements it actually doesn't.
-Beijing is Smaller than Cairo
-North Korea & "Taliban occupied Afghanistan" does not prosecute Christians