All life is sacred, or no life is sacred. It is only the human race that discusses the rights and the wrongs, the good and the bad, the moral and the immoral - the just an the unjust.
It is the history of humankind that has tried to make things black and white, trying to conjure up order out of chaos, trying to invent rules where there aren't any.
The dynamic balance of nature is something that we are all subjugated to, no matter how much the environmentalists are so "worried about the planet". If there is anything where the concern really is - it is for the future of the "human race", not the planet.
Nature has this wonderful way of balancing itself out - something dies in order for something else to live, something gains advantage over another thing - but all of this is not permanent - what is up will be down and what is down will be up.
Humans have choices that most other animals don't - and like any other thing - when given a choice - things can go either way.
Give a man a hammer - and he will build a house. Give another man a hammer - and he'll smack the first one over the head with it.
Don't give a man a hammer at all? Yes, that's an option too. However, who has the authority, and I mean - really has authority to bestow or withhold man's freedoms to him or from him, respectively?
It is not man that has that authority.
There is one "intermediate agent of balance" that equalizes all - and that is nature.
However, it is only man that has the audacity and arrogance to raise himself above nature and think that he can do better, that there is a degree of authority over nature that he has that is higher than that of any other species. But still, in this capacity also - he is natural.
All that man has - is more options - but in the whole of nature he is of no more worth than the single bacterium on a speck of dust.