I didn't think it was out of place. In Tanzania, where an extraordinary number of albinos are born every year, albinos get hunted and eaten because people believe their body parts have special powers. Children are more at risk because they're easier to hunt down. So if people do that with human children, it stands to reason that they would have even less scruples about doing that with aliens that have very little in common with them. I'm not sure how widespread this belief about albinos is in Africa, but to me the 'alien bodyparts have medicinal effects' thing made sense in that context.