Kristoff has no idea about that particular experience, but would be certain that if an American soldier was killed in Latveria, it was the fault of either 1. Senseless foreign intervention, or 2. Zorba. These are the only reasons, in his mind, why a decent man might be killed in Latveria. Otherwise, only bad people die in Latveria.
...and when they don't, and go on their merry way for twelve years, the situation should be Rectified.