What Is It?
The 2017 anime (animated) movie Genocidal Organ.
This is how The IMDb describes this anime movie:
Set in a time when Sarajevo was obliterated by a homemade nuclear device, the story reflects a world inundated with genocide. An American man by the name of John Paul seems to be responsible for all of this, and intelligence agent Clavis Shepherd treks across the wasteland of the world to find him and the eponymous “genocidal organ.”