Respect, not rivalry
You can appreciate the history, even if you don’t appreciate the team
Where I live near Boston, the hockey fans I know don’t have much use for the Montreal Canadiens.
I root for the Bruins as much as I do anyone, although not hardcore like a lot of people I know, but I know how it goes.
However, even if you hate the Canadiens with the heat of 1,000 white-hot suns, if you’re in Montreal, and you get a chance to tour the Bell Centre …
… go down to ice level (even if it’s being set up for a concert the next day), see the media lounge and press box, the alumni lounge …
… and the locker room, you go, and you respect it.
You may even like it.