I have already said pulling the gun was stupid, I haven’t missed anything, if the HOA owned the property that means that particular owner was a part owner, because his dues are part of the HOA.
In my case, our HOA has signs all over the place in our community lake which state, No Boating, No Swimming and No Fishing, all for liability reasons. Yet, we have kids all the time fishing in the lake right in front of signs that say No Fishing.
It’s likely this particular HOA had similar signs or a rule against fishing in a common area, which if true it’s incumbent on the owner to tell the kids to leave.
I have personal experience in this matter, my wife and I own a 2nd residence which is a condo, there is a community pool that has a sign indicating no trespassing, Owners and invited guests only. One day my wife and I arrived at the condo and two women and their kids were swimming in the pool, no one knew who they were, we called the local police to come out, they ran them off and told us the people were from a nearby town and wanted to swim because it was hot, there were not owners or invited guests, they had to go immediately, if someone got hurt or drowned, they would sue the crap out of us despite being in an area that was prohibited to them.
He had every right to tell them to leave.
Did he have the right to ORDER them to leave? The answer is unclear, and almost certainly "no."
Did he have the right, under any circumstances, to commit an armed robbery?
No, stupid is locking yourself out of your car or believing what the corrupt in government tell you. Pulling a gun on someone can get you killed and thrown in prison. This dangerous assh*le needs a serious mental evaluation.