The problem with some of those descriptions is this.
You could have a campground at your back 100 yards away, and still be safe shooting in the opposite direction, so a few miles is not specific enough.
Call me rather skeptical, but parts of that area are just simply desert. Day use? Seems to me that’s kind of a stretch. “Hey, we’ll tell you what public lands you can use and when.” I’ll bet locals are out there goofing off all the time at night.
The chanting of Islamic things is problematic. I think that’s enough to call attention to these folks and roust them for information and identification, so I’m not entirely defending these guys.
I’ve also seen government types blow things way out of proportion at times. Some of this seems to lean in that direction.
If this were any other group, I’d pretty much suggest they should cut them some slack. With this group, I wouldn’t.
I think was bothers me is the flimsy excuses they use. Just call it a problematic group and be done with it. Don’t bring up 1938 spitting on the sidewalk type of justifications.