The YouTube comments and tweets about it were actually trash talking the girlfriend for getting in the fight when it was "just between Jonny and Nia." Unfortunately, when I went to look up the logic and reasoning for the producers not stepping in all I found was comments and articles about how awesome Nia was. Sigh.
That was my exact thought. When Marlon stepped in I initially thought it was the producers about to kick her out. Now they're voting? She is psychotic. The season prior they kicked a guy out for failing a surprise drug test. But a girl goes ape shit on a couple people? Nothing.