If we do good works, rescuing people from lives of sin, and if we preach the word of God to the towns in which we live, things will change, but not always for what we think is the better.
Before Paul had cast a spirit of divination out of a girl, she had brought her masters a large profit by her divination. Then this happened, “But when her masters saw that their hope of profit was gone, they seized Paul and Silas and dragged them into the marketplace to the authorities. And they brought them to the magistrates, and said, ‘These men, being Jews, exceedingly trouble our city; and they teach customs which are not lawful for us, being Romans, to receive or observe’” (Acts 16:19-21).
Paul and Silas did not preach Jewish customs, but they preached something that transcends all cultures. However, the masters of this girl had to come up with something, so, they used the Jewishness of the preachers to incite the town against them. It worked.
Nevertheless, you will read that Paul and Silas used it to the advantage of the gospel.