Renzo is a legit maniac. He has been like this since the beginning, not surprising at all. But the charges are just misdemeanor assault charges, so I also sort of doubt it was some organized gang beating. That story is pretty self serving, so it probably is not entirely true either. I have no doubt that Renzo did assault him like a lunatic though.
There are 3 kinds of Gracies:
the Rorion/Ryron/Rener (The Gracie Academy)group. These are the sell out hucksters who sued over the Gracie JJ trademark, sell the blue belts through online curriculum, and try to rewrite history. Helio invented leverage, the Gracie diet, all that nonsense. This is why I can't stand Rener or Ryron, they are complete hucksters, trying to make a quick buck while spouting blatant lies and never competing. They do train some MMA fighters but they seem like a cult and are super annoying.
the Renzo/Ralph type. Everyone respects them, but they are crazy all accounts. Extreme hardasses that are actually crazy.
the Roger/Kron/Ralek/Clark generation- these guys so far are level headed and actually back up the talk by competing. Kron and Ralek have shown some pretty strong douche tendencies though.
Royce/Rickson/Royler/Relson- These are the 2nd generation guys that really made gracie JJ popular in America (along with Renzo and Rolls). They have an overabundance of hubris but haven't really done anything super terrible IMO. They come off as douches a lot, but I think that is a family trait. Everyone respects the shit out of Relson.
The only person with the last name Gracie that comes off as a gentleman and scholar pretty much 100% of the time is Roger (Clark and Rolles are also legit grapplers that have not shown any real terrible qualities IMO).
Bottom line, many of them are bad people. But it is a huge family and every one of them is in the family business. If you did the same breakdown of my family, it would look a lot worse... some are dicks, some are not. One thing that can't really be argued is that for 1 family, they have a shitload of guys that are good fighters.