I thought the same thing. Who in their right mind would kill an animal, bury it then dig it up months later. Have they not heard of fridges? I know that there is a group of "scientists / nutritionists / (researchers) studying the technique that these people use. What is of interest is the bacteria and why don't these people get sick.
The comment was not aimed at you or any other European person. It was a statement that simply gave a geographical location to this mysterious group of people that practice some rather interesting techniques. The fact that I mentioned Europe (rather than Australia) should make it more believable, for humidity, temperature are one your side and cultural practice are far more alive there than here in Australia. We are Australian so we do have "a culture", but we simply copy what every one else is doing.
A great indicator is the activity that surrounds market places in Europe. What a wonderful vibe, here in Oz we are still "cutting our teeth" when it comes to cultural activities.