Actually it was. Even the guys on NFL network that don't like the Pats (Sanders and Irvin) wondered why they didn't call hands to the face on both players. The OL had a grip on Banta0Cains mask at the same time he put his hand up into the guys face.
I think this has been well known. Add minimize your mistakes to the list and you'll have a good chance of beating the Patriots. In fact it was the Patriots who made a higher then usual number of mistakes. The Patriots are certainly beatable. The Packers do have the defense and the personnel to defend against the Patriot offense. Of course the Patriots offense still put up 17 offensive points (minus the 14 for the pick 6 and the gimme on the 4 after the Connelly runback) so even then they scored more on the Packers then most teams.
