Assuming it was a joke...

Peter Kreeft in How To Win the Culture War, writes:

I know a doctor who spent two years in the Congo winning the confidence of a dying tribe who would not trust outsiders (black or white) and who were dying because of their bad diet. He was a dietitian, and he saved their lives. Once they knew this, they trusted him totally and asked him all sorts of questions about life in the West. They believed all the amazing things he told them, like flying to the moon and destroying whole cities with one bomb, but there were two things they literally could not believe. One was that in the West there are atheists- people who believe in no gods at all. (“Are these people blind and deaf? Have they never seen a leaf or heard a waterfall?) The other was that in one nation alone (America), over a million mothers each year pay doctors to kill their babies before they are born. Their reaction to this was to giggle, which was their embarrassed way of trying to be polite, assuming it was a joke. They simply had no holding place in their minds for this concept, and they expected every day that the doctor would tell them the point of the joke. And it is we who call these people “primitive.”