Apparently, your ethics allow you to murder innocent individuals. I asked someone else this question but I'll ask you too. If you're okay killing an innocent person for a cause you think is just, then you must be okay with being murdered if someone else feels they have a just cause. Say someone told you you could win everybody on Earth free subway sandwiches for a year, but to win that, they'd have to kill you. This would produce a great amount of happiness in the world, and it would even prevent many people from starving to death. Using your own logic, this means you are okay with this scenario, as it saves many lives. Thanks for the subway, bro, your sacrifice is greatly appreciated.