I went to IU 75 -79. We had a Bible study group that met in the commons area of one of the residence halls.
Routinely complete strangers would come to us and threaten police actions if we dared try and speak to anyone outside our group about Jesus.
“Routinely people would come up to our group ... (threaten us not to share the gospel).”
Sounds like a missed opportunity to share the gospel right then and there with that person. Might be a perverse plea.
If he is indeed a son of the devil and acted on his threat, great would be your reward in heaven as Jesus promised.