I believe what you are describing is real.
I would encourage you to ask Jesus to handle the demonic, and also ask for His grace for you to handle the people. We're always fighting the battle on two fronts: spiritual and people. None of these people are of any threat to you because you belong to Jesus. And whatever is controlling them, you turn that part of the battle over and defer final authority to the Lord and ask Him to step in and battle those things. Then you pray for the people involved and ask God to grant them repentance, grant that their eyes become opened, and ask God to grant them grace to be convicted of their sin and seek salvation in the Lord.
I know exactly what you're talking about and that's is what I do, what I've done for years, what I'll continue to do until the day He calls me on home.
In the end, where people are concerned, it's ultimately up to them to decide for themselves whether or not to seek God. But, you can pray, you can seek Him, you can intercede, you can throw your hat in the ring on behalf of their souls. You can share the Gospel with them and love them. As to the spiritual things present there ... you ask the Lord to take up that battle and only do something directly if He specifically tells you to. It may be that you're not equipped, and if not, that's fine. Nothing stopping you from interceding for the people involved, though, which is something you're definitely equipped for.
God wouldn't be thumping your nose in this if He didn't want you to act. So get on your knees, and act.
Even so, come Lord Jesus!