Mortal enemies?

Khieu Kanharith said: “Since before, he used to work with the Khmer Rouge, and he is a man who always opposed Hun Sen. Secondly, we need to ask who in ’97 were warring in Cambodia, was it the Khmer Rouge or Funcinpec? I am currently congratulating Funcinpec officials because they are patriotic, that was why we fought only for two days. But because Brad Adams used to work for the Khmer Rouge, for those who live in the camps (resistance fighters along the border with Thailand), that’s why he is a mortal enemy of Hun Sen. (Source)

Yes of course, that is exactly why Brad Adams, the Asia director of Human Rights Watch, criticised Hun Sen. They are mortal enemies. It is strange that any criticism of any government official, is attributed to personal vendettas or mortal enemies, rather than the real abuses of human rights in Cambodia. I wonder why that is...