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...
I will just roll my eyes and shake my head and move on instead of saying what I REALLY want to say....