Sitton told Sports Radio 1250: "They go after quarterbacks, their entire defense takes cheap shots all the time. That's what they do, that's who they are. They're a bunch of dirtbags or scumbags.
"I mean, that's just how they play. That's how they're coached. That starts with their frickin' coach. That starts with their head coach, [Jim] Schwartz.
"He's a dick, too. I wouldn't want to play for him. It starts with him and their D-coordinator and their D-line coach. They're all just scumbags and so are the D-line."
The Packers face the Lions on Thursday with a 5-5-1 record in their season after week 12.