Because I think there's one corner case, which I suppose is widely considered to be the default nowadays (which it isn't).
The corner case is this, if you let a group of people to be able to say/speak that they are gonna exterminate you when they are big enough then the said targeted will be killed.

It's a logic reasoning based entirely on fear and evaluations. But even tho fallacious it can happen.
But these sort of people forget something that exist on all levels of tribalism, M.A.D.
Thus nothing happens as long as you are also prepared and showed your intention of defense.

But in this current time these people do not consider that and prefer to do preemptive strikes, legally and non legally onto what they consider the "bad" people, even tho they often touch innocents.
Thus people who did not wish any harm are now actually seeking and saying that these people should be exterminated etcetera....
And thus the logical fallacy continues.