This boy needs your help. He desperately needs adults to place boundaries on him. I say sit him down and give him an honest heart to heart talk about how his statement made you feel and your worst fears about it, and how this attitude could grow and affect him for the rest of his life. Tell him what goes around comes and around and what he puts out, he'll eventually get back. Tell him you love your daughter and don't want her harmed, but you are almost MORE concerned for his future and his eventual safety. Treat him like an equal but make it clear where you stand. Then, if you're willing to accept responsibility, let him know you're there for him if he needs any help in learning how to be a nice kid and grow up to be a strong man like yourself.

It may seem futile if he's a product of bad upbringing, but I always like to think we can help others in small ways.

Maybe, firstly, just need to look again at how and why the situation arose... he wasn't being shown something he wanted... (no big deal, children do that all the time....) perhaps he felt frustration, resentment, anger... all those things and more?

You suggest he doesn't have a great grasp of language, so maybe he just hasn't developed any good negotiating verbal skills that could have seen him get what he wanted from your daughter in the first instance, you could teach him some? Frustration makes us lash out, and he used words which he knew would hit the spot, so to speak, as he probably doesn't know any other way?

Introduce him to the world of alternatives, explain how there will always be another way to deal with every situation, aside from threats of/or physical violence. He's 7 yrs old, he's not a lost cause, he just a lost kid who seems to be desperate for some attention, as you say he's a crybaby, a show off. I just think he may be screaming for some attention, and again, doesn't have any other developed skills by which to gain said attention, so he acts up?

I would doubt he's as tough as he is trying to project, children like that usually aren't, they just don't have the skills to deal with all the emotions they have, and perhaps again he just needs encouragement to find other ways to deal with his frustrations.

I appreciate that in three days you may only be able to scratch the surface, if you choose to, but at least you could, to use a phrase from another post 'plant the seed' in the child, that there is always another way?

Good luck anyway whatever you decide to do

You suggest he doesn't have a great grasp of language, so maybe he just hasn't developed any good negotiating verbal skills that could have seen him get what he wanted from your daughter in the first instance, you could teach him some? Frustration makes us lash out, and he used words which he knew would hit the spot, so to speak, as he probably doesn't know any other way?

Introduce him to the world of alternatives, explain how there will always be another way to deal with every situation, aside from threats of/or physical violence.