Read Acts 16:16-24
The slave girl is at the bottom of the pile. She is enslaved by men who use her for profit, enslaved by an evil spirit who enables her to know things that she shouldn't be able to know. And the spirit in her is not happy – because followers of Jesus have just turned up in their city. Paul takes his time before intervening – it's not safe to mess with people's profit margins. Not then, not now. (Like missionary William Carey, who went to preach the gospel in India and was unable to preach it in the parts of India controlled by Britain at the time because they feared that it might cause trouble and adversely affect the economy).
The bible says that Christ came to bring us freedom – but we would be wise to remember that this world profits from people being enslaved. Liberating people often threatens existing financial interests and results in serious opposition.
From slander to murder, we should not be surprised by the opposition that the liberating truth of the gospel brings.