Ok... I'm not sure how successful you've been at striking up conversation with them if you have this much trouble with Harry Potter, but good for you.
I just find that people usually know when they're sinning or have some deep problem in their life. They don't need you to tell them. They need you to show them that there's a better way without first rubbing their faces in their sin. God takes care of that part.
***I'm not sure how successful you've been at striking up conversation with them if you have this much trouble with Harry Potter, but good for you.****
I have a connection with them. I came out of similar darkness before I was saved.
Usually the conversation goes back to philosophical quesions of some sort. Often it is "ideas" which hold these peoples minds captive and it is the ideas which must be attacked and dismantled.
In your witness to them do not be discouraged. You may not see results for a long time. I recently found out a satanist I witnessed to 15 years ago finally came to Christ.
Be cautious also and pray. In witnessing to them you open yourself up to attack.