Nerd,

I'm of course in agreement with many of your arguments in your response, but then I never had an issue with them before. In particular, I have no issue with you about the word 'inhuman'. My only minor point was this:

I consider your implicit argument Now name a MAMMAL species of which members semi-regularly decapitate other members wrong for it equates lack of knowledge with lack of existence.

That was my only point and not all the other things you have addressed. And whether the frequency of a behaviour is called "a relative rarity" or whatever doesn't really interest me. Numbers do, not verbal labels.

Wolfgang