Murder for gain is a crime almost as old as time itself but the sheer calculating savagery of this slaughter transcends most civilised peoples' understanding, unless of course one is an Asian in which case the complete destruction of the Frenchman's family makes sense. Mind you, disposing of the remains in a pond within the property where they were bound to be found is also indicative of a stupidity that could only be Asian in its simplemindedness - one doesn't get much thicker than uneducated Asian peasants whose ignorance is almost of simian proportions.
They have a curious lack of empathy too that sets them apart from the rest of the world and permits what we more sensitive folk would regard as inexplicable barbarity.
Essentially, they are cruel in a way only a 7 year old child can be but I suppose that is only to be expected since that is the mental age of most provincial Asian adults.