Cambodia ALREADY lost like 60% of its historical territory over a period of a few hundred years. Vietnam and Thailand took turns carving up pieces of it, and in Vietnam's case they went ahead and genocided everyone to death, and turned the land 100% Vietnamese.
So there's no country that's more hyper-sensitive about its borders, and coincidentally there's no country where people fear death less than Cambodia.
Look at how much better he speaks English than anyone from Japan or Korea or Vietnam too. He's super relaxed even though he speaks it quite poorly. These are the least Asian people in Asia