It's unfortunate that the issue is compounded by tribalism. Republican hate, especially for brown people, has fueled the vast majority of the motivation for the death penalty in the US. Which of course means that there can be no other reason for supporting some ideas about euthanizing humans(sarcasm). We understand it perfectly with animals, you have one kid shoot a cat because he hates cats and he's a pos, but you have another kid shoot a cat because it's sick and yes it's sad, but also compassionate. One kid has hate in his heart and one doesn't, two identical actions, but with tremendous difference. For some, those differences are impossible to see.