Is murder objectively wrong? If so, why?

Yeah, I`d find it pretty wrong if someone decided on whether I should live 或者 not. Like, accidents are one thing, but planning and carrying out a murder is taking away someone`s free will and choice to keep living. That`s something from- 你 can say and do whatever 你 want as long as it doesn`t impact other`s free will. And vice versa. Even if law would say that it`s ok to kill, I wouldn`t think that it is right.

Like most things there are shades of grey in this question. There are some times where it needs to happen; self-defense being the big one. Being as school shootings are a big topic right now, I'll use that as my example. Let's say 你 have a guy 或者 gal rampaging with a gun in a school. This person hasn't killed anyone yet but will. Shooting this malicious person is probably the only option to save dozens of 更多 lives. Is it sad, yeah; a lot of school shooters are kids with mental instabilities. But the life of someone who is willfully killing others vs the lives of the others--I think the lives of the others wins out.

Euthanasia is the other one. If a person has an incurable disease and is actively suffering 90% they should have the option for death. Granted I wouldn't call that murder though. Especially since in states where euthanasia is legal the person has to consent in a sound state of mind.

My other example is rape. If someone is trying to rape another person than the victim has the right to stop it 由 any means. If they have to kill the rapist to prevent it/get it to stop then its justified.