Ahh, I’m not arguing we, as in humanity today, should do anything yet.
I’m saying that the people alive and in charge at the time made a mistake in not wiping out every nazi they could find.
Age is no barrier to such things at all. A 13 year old can be tried as an adult in many places for extreme crimes. Child soldiers have been sent to war for millennia, and still are today. Children are quite capable of committing atrocities. I wouldn’t want to do it, I wouldn’t want to see it get that far. But it was a mistake not to go as far as necessary to eradicate anyone that served the nazis because there’s absolutely no way other than actions to prove what the individuals believed, and even that has flaws.
How many children had already been killed? I’m not even talking about by the nazis. Look up the Dresden fire bombing. Plenty of children were burnt to ash there. Hiroshima, Nagasaki. The are just the famous ones. The allies had already killed children of all ages by the end of the war. Pretending that there’s a moral difference between that and executing them is not useful. Executions would even be arguably less horrible since it would only target those that were in the armed forces.