Why the downvotes on the original reply? Are people so thin-skinned that they can't take their arguments being called stupid, or are they so ignorant that they bury an argument they don't agree with?

No, glutamate. Your original comment was rude and uninteresting. "Stupid" isn't an informative criticism (not even if you specify that the stupidity is "incredible"), and it signals contempt and disrespect besides. Uninformative criticisms that signal that attitude are not readily welcomed here.

You could have said - if I interpret your view correctly, which I may or may not - something like:

We're familiar with humans dying one at a time, and being mourned; this is significantly different from simultaneous annihilation. Saying that the human species deserves to die and then cashing that out in terms of individual humans evokes images of the former, whereas the latter might be a better approximation.