I'm going to blow up at my neighbor for not preventing my child from going missing
Like you're gonna yell or insult him?
I'm just going to grandstand him
I know you're frustrated, but you shouldn't blame such a thing on others. You need to learn to take responsibility.
No, it's his fault since he's supposed to monitor the children.
It's your child, though. So ultimately the blame would lie with you, not your neighbor. Don't take it out on him.