One of the laziest dismissals I've ever read on this forum. Yep, the world is this zero sum game where they should just dump it on whoever and then let all the competing entities argue amongst themselves
There is also a fourth individual, a thief, who has broken in and stolen various family heirlooms of both sentimental and monetary value.
The thief claims then that, because the inheritors are squabbling, the only fair thing to do is that he should hold on to the heirlooms, at least until they sort it out (or so he says).
The response is short because the situation is simple. The British Museum contains the stolen heritage of people all over the world. Confusion or disagreement over the most rightful heirs is no defense of this crime.