I also see a lot of people saying Carpenter is 100% to blame.
Let's break down the video then:
0:06 Phillips goes to tap Molina on the shins (I'll take the reds fans words that this is a ritual he does) Molina kicks his bat away. Clear sign of aggressiveness, but if Phillips does this every game, why were there no other incidents like this in the other games these teams have played? Phillips taps his shins again as he walks away to take practice swings. Yadi says something (only 3 people in the world know what it was). Now, I'll give Phillips credit because he does try to ignore him, but Yadi steps up to meet him and they both start yelling at each other.
0:20 Benches clear.
0:24 Rolen grabs Molina and does what I would say is a good job of mediating and calming him down.
0:37 Baker trying to keep his players back
0:55 - 1:13 LaRussa and Baker seem to be the focus and are yelling back and forth at each other.
1:16 Umpires separate LaRussa and Baker and as Baker is being backed off Carpenter says something that makes both Baker and the Umpire turn their attention to him. Not sure what it was, some Reds fans are hoping that Carpenter used a racial slur, Baker first response is clearly "Hey, **** You!". Even now this has just been a war of words. Everyone on the field is yelling at each other, so I doubt more words pushed this over the edge.
1:21 Rolen grabs Carpenter. No one is charging towards the backstop UNTIL this happens. I'm not saying Rolen is at fault, but this really is where things escalate. (NOTE: Cueto runs from the complete opposite side of the scrum to where he is pinned against the back stop by his OWN TEAM. Also, notice how Carpenter is pinned against the backstop by his team, yet, NO kicks)
1:30 - 1:39 Cueto starts kicking. A lot of people say it is out of panic, but his kicks are clearly targeted at LaRue. Maybe he should have asked the people pinning him to the backstop (aka his teammates) to let him out?
2:22 Video switches over from FS Ohio to FS Midwest