Your set of questions are an interesting query about the characterization of Hezron in The Bronze Bow. In short, Hezron says that "law" is stronger than all the power of Rome and, considering the spread of the teachings and "laws" of Christ, yes, time has proven Hezron correct.
Hezron, the father of Joel bar Hezron, is yet another rabbinic character in The Bronze Bow with definite feelings about law. Always waiting for his people to be released from the tyrrany of the Romans, Hezron believes in law over violence. He thinks that law is the only thing that will defeat the oppressor (at this time) that is Rome and any future oppressor in the future. Hezron speaks mostly of the Jewish law here and, perhaps, governmental law that would be followed by the people. In reality, it is not Joel bar Hezron nor his rabbi father nor Daniel who sheds light on this. It is Simon:
“We can never know," Simon answered slowly. "God hides the future from man's eyes. We are forced to choose, not knowing. I have chosen Jesus.”
In conclusion, there is a grand irony that proves Hezron correct: it is CHRIST'S law that triumphs, not the law of government. This is not what Hezron would expect. In fact, his own son ultimately has a huge choice within the novel and chooses Jesus love over the "law" that his dad would choose. It is the law of Jesus' love: the love of God and the love of neighbor that triumphs here in this novel.