Is there one prophet that your ancestors didn't mistreat? They killed the prophets who told about the coming of the One Who Obeys God. And now you have turned against him and killed him.
That's true enough. But they were cut away because they did not have faith, and you are where you are because you do have faith. So don't be proud, but be afraid.
Warn the rich people of this world not to be proud or to trust in wealth that is easily lost. Tell them to have faith in God, who is rich and blesses us with everything we need to enjoy life.
Some godless people have sneaked in among us and are saying, "God treats us much better than we deserve, and so it is all right to be immoral." They even deny that we must obey Jesus Christ as our only Master and Lord. But long ago the Scriptures warned that these godless people were doomed.