Eh, past incidents aside, I cannot hold Browns fans cheering for their team in the brawl against them. The odds that most of the fans in the stands saw what happened in real time are slim to none. Many of us watching it on TV, with a better view, didn't see the helmet smash until the televised replay. Heck, neither Joe Buck nor Troy Aikman realized how awful it was till seeing the replay. Most fans in the stands were probably drunk on booze and/or celebrating the win and had no idea what started the brawl. All they saw was fighting and you are naturally going to have the back of your team.
All that said, I would suspend Garrett indefinitely (for the rest of the season and then re-visit it next summer), I would give Pouncey a game or two for the kick, and I'd be okay with fines to both Rudolph (who tried to rip off Garrett's helmet first and then escalated the situation several times before getting clubbed with his own helmet) and the Brown who clobbered Rudolph from behind when he has his arms outstretched asking for a flag after Garrett hit him with his helmet. In fact, give that Browns player a game for that cheap shot.
Also, while Pouncey deserves a game or two for the kick, mad props to him and the other Steeler. They did what teammates are supposed to do, which is to protect your QB, and they went after Garrett, right after the helmet smash, like he had just robbed their grandma.