IDK, overpopulation is one of the largest factors in every major problem facing the world today. Reducing that population removes pressure from the mechanisms of society that are failing, which could quite reasonably be considered a positive and perhaps even imperative contribution to the group as a whole.

(Obviously I don't think that, it's a hyperbolic example on all sides, but that's the issue with trying to claim objectivity in morality: there are points within that justification for random death that from a certain perspective could be considered wholly valid)