Many were called to repentance in that day, and few where chosen. In that day, the apostles went around spreading the news about christ, being hindered by Satan, and not only that they died for their faith. Some people remained alive, and remembered the message, and continues to have hope that Yeshua would return and would be seen and they would been taken onward from the life they were experencing in their areas of life, when they gathered at Jerusalem at the temple mount. Mothers who were pregnant in these days suffered, people started to eat each other because of the famine having no food, and then the Romans came in and slaughtered 1,000,000 people in the face of God's wrath upon them which was justifyiable.
If you think that God is still angry with people today, or that God has not done away with all your past, present, and future sins, you will struggle with yourself throughout your entire life. Yahava elected a group of people, just like in the old testament who did not put a knee to baal. This group of people was the bride of Christ, and Yeshua returned for them. However, if you believe that this is not true, you will continue to struggle in this world looking at everything around you and not realizing that God through Christ has reconciled the world back unto himself.
All there is left is - to have faith and to love. So simply yet difficult to grasp.