I honestly don't hold any grudge against the Packers apart from obviously FTP. Not being from America I don't really care about border battles or all of that that comes with it. Division rivalry is one thing, but hating on them because they're Wisconsin and the Vikings are Minnesota... Nah, not my bag.
I don't really like them as an organisation, I don't think most of the former players have had good things to say about them. But also... I dislike them less now that Aaron Rodgers is gone. He was too smug for my tastes.