Ok, I'll explain otherwise:
Big thing is killing people and offers you 2 choices.
-Option A
-Option B
You guys are debating which option is better.
I propose that we kill the big killing machine instead, whatever the cost is. In the meantime, use the choice that profits the most for you, keeping in mind that we want to kill the big killing machine.
The "big killing machine" has the capability of killing people with impunity. Option A is killing one person to save the rest, Option B is doing nothing, resulting in the deaths of those people. There is no C, trying to destroy the "big killing machine" has the exact same effect as B.
I know, because the machine is not stupid enough to give you that option on a silver plate. The "big killing machine" is happy that great intellectuals are fighting each other to find which option is better, so that it can continue to kill without being bothered. When a superior entity like the "big killing machine" has domination over a group, it prefers to make empty debate so the group can lose their time over it, than having this group use their time and knowledge to fight the "big killing machine".
This is a utilitarianism vs. rights/morality debate; you're subverting the whole point of the question with this argument.
Every debate has a context, you cannot just trash the context to analyze what pleases you. If I could give an example using the Allegory of the Cave, right now, you're debating over the shadows on the wall. Oh sure, you make big and long debates to determine if the utilitarianism shadow is better, or the right shadow is better. But I'm asking you, where these shadows come from? Why are you in a cave, looking at shadows in the first place?
Or using the context of the OP, why the fuck are you in a world where a "big killing machine" is killing random people in the first place? It's not about who is right in the debate, it's about winning against the machine.
My answer to this debate is, I'm ready to sacrifice all the lives we need to be able to win against the "big killing machine". In the meantime, it's important to keep enough humility to be able to switch on either side of the utilitarian/rights debate depending on the situation. The losers are the ones that are stuck on only one side, incapable of adapting their way of thinking if the situation change.