I would care, but itd be a weird situation. If you have been a dinamo supporter your whole life, you're understandably apathetic to them now but you still care about them I'm sure and look forward to the days or hope for a better future? You're still a dinamo supporter, just more like how many were with Mourinho, frustrated, annoyed and hoping for change.
That's what I mean. I'm not gonna stop watching United, not gonna stop supporting them regardless of who the owner is. The owner isnt the face of the club in my eyes. It would suck and put a damper on things, sure, but the guy putting money into the club isnt what I'm supporting. We fall into the 2nd division with some idiot in charge or compete for everything with billionaire owners, either way I support the club.