Originally Posted by
Ravenblade
The depictions which the supposed saluto romano is based on are usually 18th-19th century paintings. Everyone adopted it from there including the nazis.
The difference between the actual Roman salute would be one higher official towards another one in respect, or one towards the masses in benevolence.
The version adopted from paintings is used as a mass-ready gesture of identity, for instance the Nazis used it as a form of repeated oath of allegiance towards the party and their leader and the traditional Hitler greeting as well as the different variations are banned in Germany.
These are different contexts, really, identity versus display of benevolence.