A dream that kills parents is basically a good dream. It means that there is a way open for them to properly open up their own world by defeating those in power who suppress themselves or block themselves or greater power. It is a terrible thing that cannot happen with the dream itself. However, parents in dreams do not mean real parents, but should be seen as representing a superior or rival who has stronger power than me so far, or a bad energy that psychologically suppresses them. So now that he is out of the shade, he is ready to stand alone and open his own era.