Dally’s vehement opposition to Johnny Cade surrendering to the authorities stems from his deep-seated worry of the detrimental results of the juvenile justice system on a susceptible particular person like Johnny. Having skilled the cruel realities of incarceration firsthand, Dally acknowledges the potential for it to harden Johnny, stripping him of his inherent innocence and sensitivity. He anticipates that the jail setting would expose Johnny to violence and corruption, basically altering his character in a damaging manner.
This concern is rooted in Dally’s personal previous experiences. He understands that establishments meant to rehabilitate typically fail, as an alternative perpetuating a cycle of crime and despair. Dally views Johnny as somebody who’s basically totally different from the hardened criminals he is aware of. He sees the potential for good in Johnny, and believes that jail would crush that potential. His actions are motivated by a need to guard Johnny from a destiny he believes is worse than the implications of remaining a fugitive.