I don’t think you should, but should we derive what is just from how much sympathy capital a given person has? Assuming your objective is to end poverty, etc, and to minimize suffering, then if you are ready to advocate for something like murder even in the hypothetical that you absolutely don’t need to, then you’re probably just letting your feeling dictate your actions. You can of course dispute that hypothetical, and there is definitely an argument to be made there, but a lot of people don’t and still go all in on it. Hence the problem with “wanting” these people to die, as opposed to “doing what is necessary”.
That’s a very good point, but I am specifically addressing the “even if there was a better way” part, which strikes me as a little spiteful, at least.