Paris said:
When a large man three times my size is standing next to my drivers side window where my 2 year old is sitting behind and he is screaming his head off into the window I think you can say it is REASONABLE to call 911.
You didn't mention this in your original or follow up posts.
Based on what you originally said, I didn't get the notion that he ever left his car.
When did he get out of his car? After you went to the guard gate, while you were at the guard gate?
All I got from your story was that he was tailgating you and was parked behind you yelling at you:
... as he was parked behind me screaming nonsense. ...
To put this in perspective, I have had my fair share of people cut me off or even almost hit me, esp in Irvine, and it's usually by people who are distracted (parents with kids, teens on their phones, older people who are lost, yuppies on phone calls) and they always think they have the right of way (and no, just because you signal doesn't mean you can force your way in) and they don't realize what they had done (to support SoCal's point). From my arm's length inspection, if someone is going to follow you like that, regardless of your opinion, you probably almost caused him to have an accident which is why he was so angry.
Was it right for him to tail you and yell at you? No. But by the same token, if you almost cause me to swerve off the road while I have my own kids in the car, I will be pissed. So just as much as you felt you wish you had your gun so you can shoot him, maybe, just maybe he felt that you had endangered his life.
It's all about perspective, and it's not that I'm being unsympathetic, but whenever I hear someone say that want to shoot someone, that is where things become questionable.
That being said, I'm sorry you had to go through what you went through and you are correct, that is a good reason to have a guard gate.