Bo's sideline demeanor (at least against South Carolina) is irrelevant. It's simply something his detractors can point to when he's down, but that doesn't make the criticism relevant.
It is very relevant. Bo was more worried about arguing calls (specifically that bogus PI call) than he was actually coaching the game. His demeanor in the second half of the USC game definitely had an effect on the outcome IMO. When your coach doesn't even know what is going on in the game because he is more worried about dropping F Bombs on the ref, that is a problem.
And I don't know where everyone is getting this idea that Bo is seen nationally as a hothead who is giving Nebraska a bad reputation. To those of you who believe that - where do you live? In Nebraska? Because nowhere else I've been recently brings that up when they talk about Nebraska football.
You must not get out much or watch games on TV ever. Bo Pelini is not liked or respected amongst the college football world, especially the fans.
Go to about any other B1G or Big 12 message board and ask for yourself. Posts after the game from USC fans themselves stated this exact thing.