Not that I'm 100% confident of this, but part of it is probably Roman culture/bigotry. The Romans considered Gauls to be the ancient enemies of Rome and utterly barbaric to boot. According to traditional Roman history, the Gauls sacked Rome ~390BC. A prominent Gaulic war leader that had some successes against the legions like Vercingetorix did would probably have caused uproar if he'd been allowed to live among the Romans.
Planetary_Nebula t1_j1s8gv7 wrote
Reply to Death of Vercingetorix by oga_ogbeni
Not that I'm 100% confident of this, but part of it is probably Roman culture/bigotry. The Romans considered Gauls to be the ancient enemies of Rome and utterly barbaric to boot. According to traditional Roman history, the Gauls sacked Rome ~390BC. A prominent Gaulic war leader that had some successes against the legions like Vercingetorix did would probably have caused uproar if he'd been allowed to live among the Romans.