It has never been about right or wrong or good or bad, the most powerful always have and always will rule the world, you challenge them and resist them and the balance of power decides who lives or dies. Countries that have accepted the inevitable like in Europe, South Korea, Hong Kong etc enjoy amazing quality of life. Countries that let delusions be their guiding light are in ruins.
I think if there is an attack it will be so swift and overwhelming that NK would not have a chance to respond and it will be over in 5 minutes or less.