Jesus spoke of a time of judgment when those ancient peoples would be given an opportunity to understand what He had been preaching to the people of Chorazin, Bethsaida, and Capernaum. They, too, will hear the good news!
Christ mentioned the people of Tyre and Sidon, Sodom, Nineveh in Jonah's time, and the Queen of the South. All of these examples of people who lived in different generations are compared to those who lived in the cities and towns of Jesus' day, the vast majority of whom did not understand or believe His message. Jesus tells us that they will all be resurrected with the generation that lived during His time!
Jesus gave enough examples of people living at widespread times to prove that most of humanity will be brought back to life at the same time on this earth. There will be pre-Flood men and women, all twelve tribes of Israel, those who lived during the Middle Ages and the vast majority living now.
Even babies and children who died untimely deaths will be resurrected then. They will all rise in the second resurrection because they had not been called by God during their first lifetime.
This group includes all people of all times except those who will have already been born of God, and those relatively few people who already had their opportunity to receive eternal life, but deliberately rejected it and sinned willfully. Those few will be resurrected in the third and final resurrection, and they will be destroyed in the Lake of Fire (Revelation 20:13-15).