I believe that in all human life there is an infinity of possibility. I don't believe it can be realized in a single human life. So I idealize humans as sacred with the understanding that they are not. This grades into other organisms as well, but less complex beings have more definite boundaries. So mosquito life can be instrumentalized if it results in malaria, and this is why we spray them en masse with insecticides.
The logic of inflicting cruelty to save lives works in the animal kingdom, but I don't extend it to us (or mammals generally but this is another discussion), so this is I think where we disagree. To me, extending this to human lives who suffer visibly results in the kind of thinking that ends in holocaust.
But I understand the counterargument. I understand why John Brown raided Harper's Ferry and why he refused to surrender. I also think he should have retreated into the mountains when he had the opportunity, but this is again another discussion. I just don't think another war will give us what we want, and this is I think what Frederick Douglas was getting at when he tried to dissuade Brown from carrying out the raid. Thanks for listening.