A 15-year-old boy was sentenced to life in prison for fatally stabbing a stranger, Muhammad Hassam Ali, after a brief conversation in Birmingham city center. The second boy, who stood by, was sentenced to five years in secure accommodation. Ali’s family expressed their grief, describing him as a budding engineer whose life was tragically cut short.
If your position was to kill all people of a particular skin color then my position would be the same. Democracy cannot work if fundamental rights are not protected from onslaught by people who, ultimately, would abolish democracy itself. Because that's where your path leads: Towards a failure to regard other people as people.
comprehend the rightness and wrongness of murder
You still fail to acknowledge that that's not what it's about. It's about executive control. If an adult has an intrusive thought they have a very good grasp on blocking it, youth doesn't. If everything works well then they're simply exploration happy, like stupid bands, invent new makeup styles and re-invent the shopping cart race. If society messed them up at a fundamental level then things like murder can bubble up, and might not be stopped by the weak frontal cortex. That does not mean that they'll regret it, though: They're already perfectly capable of rationalising, and will do so to maintain a consistent self-image of themselves.
Did you understand anything of what I just wrote. Please rephrase it in your own words ("So you're saying that...") so I know we won't continue to talk past each other, there.
More generally speaking, there's an African saying: If a kid does not feel the warmth of the village they will find the warmth they deserve by setting it ablaze.