Generally, for a crime to be committed there has to be a criminal intent. Since (1) your "threat" was meant as a joke to a friend, and, (2) you accidentally sent it to the wrong person; there is no criminal intent. You will not be arrested.
It IS possible, since death threats fall into cyber bullying, depending on the nature of the bullying, the people involved, and the authorities. But smarten up!
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.