That is normal to scout a rally/meeting place out before having an event.
I would have ask the police officer if he had a warrant, if he did not I would have told him to go away. If he did I would have call my lawyer or find a layer quickly.
It is a good idea to find a good lawyer to call and have them on speed dial.
He made a mistake talking to them without a lawyer present. Good that he recorded so there is he said issues.
He did later in the video.....but you knew that.
He was a participant, not an organizer. You're going to spend half a day driving a hundred miles to walk around a rally site days before the scheduled event? OK, if you say so.....
“That is normal to scout a rally/meeting place out before having an event.”
Maybe, but it’s also normal for terrorists to scout out public buildings and places where large gatherings are going to happen before having one of their own “events”.
What are the cops supposed to do? Not investigate something suspicious because people might get offended?