I disagree. It's not immature in any shape or form to dislike someone. And it has nothing to do with needing to grow up. That line is completely distasteful and uncalled for.
I agree with most of the rest although not most on this forum 'hate' Brett. Once he's retired and not playing for a rival, the perceptions will change.
As you finished with, everything will blow over, I agree with that as well.
Again, I wish Brett well, the Vikings bad (I'll never stoop that low to root for the Vikings or buy one of their jerseys) and of course Brett to not get a W against the Packers, lol.
Other than that, I'm excited to see Brett continue to play. He's a phenomal athlete and one of the rarest talents we've been lucky to see and we should appreciate his effort.