The more complex story is to look more closely at timelines, history, and maps. It was June of 1938 - the rumbling beginnings of World War II. German troops already occupied Vienna, Austria and Hitler declared to destroy Czechoslovakia just one week before Ernst’s death. And as for maps? The Rhine River, where Ernst drowned, separates Germany from its famously neutral neighbor - Switzerland.
Could something have gone wrong in Ernst’s attempt to cross the river to safer borders? There’s no way to know, but when you consider the lives of his other German-residing siblings, you think maybe he had a hunch for what was coming. In the next few years, one brother would be killed in the Siege of Leningrad and another in the largest confrontation of World War II - the Battle of Stalingrad. Seven of the siblings would die in Germany within eleven years, all deceased before 1950, all before age 37.