jokes like "haha I hope DPRK *does* bomb us I wanna die anyway!!!" are super not funny for two reasons.
1. Language like this affirms the US government's bullshit assertion that Americans are in danger. It will simply strengthen the country's view of DPRK as a "bad" country, legitimizing the inevitable military action against them.
2. In the event that DPRK *did* begin a nuclear war, it is South Koreans, not Americans, who would likely bear the brunt of the damage. Check your privilege.