Those 2 links certainly satisfy my request. Thank you.

My summary of Eliezer's deleted tweet is that Eliezer is pointing out that even if everyone dies except for the handful of people it would take to repopulate the Earth, even that (pretty terrible) outcome would be preferable to the outcome that would almost certainly obtain if the AI enterprise continues on its present course (namely, everyone's dying, with the result that there is no hope of the human population's bouncing back). It was an attempt to get his interlocutor (who was busy worrying about whether an action is "pre-emptive" and therefore bad and worrying about "a collateral damage estimate that they then compare to achievable military gains") to step back and consider the bigger picture.

Some people do not consider the survival of the human species to be intrinsically valuable. If 99.999% of us die and the rest of us have to go through many decades of suffering just for the species to survive, those people would consider that outcome to be just as bad as everyone dying (or even slightly worse since if 100% of us were to die one day without anyone's knowing what hit them, suffering is avoided). I can see how those people might find Eliezer's deleted tweet to be alarming or bizarre.

In contrast, Eliezer cares about the human species independent of individual people (although he cares about them, too).

Also, just because I notice that outcome A is preferable to outcome B does not mean that I consider it ethical to do anything to bring about outcome B. For example, just because I notice that everyone's life would be improved if my crazy uncle Bob died tomorrow does not mean that I consider it ethical to kill him. And just because Eliezer noticed and pointed out what I just summarized does not mean that Eliezer believes that "it might be ok to kill most of humanity to stop AI" (to repeat the passage I quoted in my first comment).