It happened, no doubt about it.
I've been to enough games at RES to know that many people sneak booze into the stadium. There are plenty of drunks in there. They are obnoxious and can get combative. I've been very close to a few incidents in that place involving drunk yewts.
If you're naive and dumb enough to believe it doesn't happen, then shame on you.
Your comment: " I have also read multiple accounts of people that were seated close to his family and they called the story BS" is not only laughable, it is not true. You can't produce anyone who says that. Anyone who witnessed the incident knows what a fool you are making of yourself by saying such a ridiculous thing. It happened.