A user who created an account to ask a fairly trollish question about rockets hitting a Jewish-majority country chose a user name of "vonbraun".
Wernher von Braun is the main person listed on the English language Wikipedia's disambiguation page for Von Braun (several of the other entries are his relatives, or things named after him, though the chemistry things aren't him). Von Braun was a rocket scientist who developed rockets for Nazi Germany (and the US) which were used in anger.
I flagged this username as inappropriate, and my flag was not merely not acted on, but declined.
I seriously doubt that the user involved just happens to have a surname of von braun - if they did, they would have chosen to use their first name as well, or only their first name.
This user's account name should be deleted.