I have a suspicion deep down that these people consume babies for their stem cells as a way to maintain youth, or some semblance of it. I think this is something that could never be studied ethically, so we don’t know if it is effective, but the long standing folk tales of babies stolen and eaten makes me wonder. The Nazis and the Soviets may have studied it, they had no ethical qualms or IRBs to deal with,\.
Mengele was said to have escaped to South America. What if he instead went to Haiti? Or at any rate some of his protégés may have? Lots of twins in Haiti.
Did the Russians capture Mengele’s research? He had no qualms in any of these areas.