From your story, I would have considered that maybe, just maybe, someone didn’t want me there.
I see it as safety is everyone’s responsibility, when the first idiot pointed a weapon at me, I would have said something to remind him about gun safety. When the second one did, I would have left.
It was a group of thirty or more people, so it wasn’t a focused (on me) activity. People were just being people.
I think you’ve got the right idea other than that. I probably should have left. I did leave before a lot of others did though.