1 Chronicles 9-11

I spent about 15 minutes reading this passage during two settings. I know that I neglect the details regarding those who returned from exile. Tens of thousands were taken into exile, maybe hundreds of thousands, but only a few thousands returned. Were they the only ones faithful to God? I don't think they hold that claim because we see over the next few centuries how Jews would travel to Jerusalem from all over the modern world. There was a remnant that returned to the promised inheritance, but there was also a remnant that remained throughout that part of the world which God was using to prepare the world for his Christ.
Stuart