In my (long, believe me) experience as a fan of this team: Most Packer fans don't start the pushing - but if they get pushed, you'd better believe they'll push back.
There have been a few Steelers fans basically declaring victory on this Packer board ("you think you can deal with it but you can't" - oy) talking about their supposedly superior fanbase, etc. (which I personally find laughable - I don't live in Wisconsin anymore, but I live in an NFL city and I have seen Packer fans absolutely overwhelm the home team's fans on gameday) - so if you see some of us sounding a bit annoyed, you can probably look right there for the primary reason.
I'm not one of those people who thinks there's no way we lose on a given day, but I generally like our chances (and though I know we could lose, I'm comfortable with our chances in this game, too). But when I start seeing the smack, I'll start throwing punches myself. And we've seen a bit of smack, that's all.
I imagine you'd all do the same, and I don't think any Packer fan would blame you.