DISCLAIMER*** Not legal advice. Also, not specific to New Hampshire, but majority law throughout the United States. Only a licensed attorney in your state can give you legal advice.
You are allowed to use reasonable force to protect your property. If someone is throwing your electronics around in your house you would be legally entitled to restrain him using reasonable and less than deadly force. If someone was throwing my electronics around I would punch them in the face, or mace them or kick them, or scratch them; all of which would be perfectly legal.
Your body was not threatened, unless he was throwing the stuff at you, so this would not be self-defense. It would be defense of property. If what you have said is true, then you acted legally.
Kick his *** out and tell the prosecutor what happened. 99% likely the prosecutor will not press charges. If he does, hire a lawyer and he'll get them dropped using defense of property.
He could press charges, but you wouldn't go to jail for 7 years. I doubt you would go to jail at all. There is another problem with his threat and that is he destroyed your 360, which is also a crime for him.
If he presses charges, he would be incriminating himself too. If it ever went to a judge, you could say that he destroyed your game and he was hostile. He isn't completely innocent in all of this.
You could easily claim self-defense for the mace. He sounds mentally unbalanced to me.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.