Agree. I'm having trouble following the discussion.

What's hard to follow? Too many people exist vs old ideas need to die which often requires death...is not remotely the same argument. One says we need to cull the herd out of an imaginary number that is viewed as "too many people;" the other says you can have tons more people and have no problems, but old ideas can hold back social and scientific progress which is a problem death of older generations helps to alleviate.

No, that isn't the same at all. One is about ideas evolving through new generations of thought not held back by the old, the other is about there being overpopulation. Imagine if we still had people still alive from the Civil War...advancement would have likely been less (many old ideas, people stuck in their ways would have thwarted human progress.) What does that have to be with there being too many humans on earth? I don't see how you can even say these are the same argument, if you had actually copied the FULL quote, it would have been very apparent.