Ummm ok....
whatever....
We aren't going to annhilate anyone, not if we don't have too. And we don't have too.
We may have to.
If we are to survive, we certainly have to kill 'enough' of them. The real question is how many are enough? n=0->1.3 billion. How big n gets depends entirely on how many it takes to make the threat go away.
I'd be just as happy if n=0 as if n=1,300,000,000 as long as the scimitar of dhimmicles never hangs over our species again...