I agree.
When you know you only have about a 20% chance of winning with Rodgers in there your best chance is to knock him out of the game. Even if Barr had gone too far it's worth it. It might mean the Division and the playoffs.
The Saints made damn sure to maul the QB in 2009. The alternative is no Super Bowl. What's that worth? Barr got the best of both, he took Rodgers out and stayed 'within the rules'. Very smart. I hope the Packers return the favor next time they play.