Further there is no threat to wife and kids. It simply says they will join you in hell. BIG DIFFERENCE.
The misleading header falsely makes it seem as if the writer is threating to run a "blackout" - killing the whole family together.
https://archive.org/search.php?query=creator%3A%22Deutsche+Gesellschaft+f%C3%83%C2%BCr+Christliche+Kunst%22
https://archive.org/search.php?query=title%3A%28%2Agypt%29%20AND%20date%3A%5B1830-01-01%20TO%201945-01-31%5D