Don't get me wrong, I can be as emotionally irrational as the next man (or lady) when it comes to supporting my football team. But that's more about what goes on on the pitch rather than in the boardroom. I support the club, not whoever happens to be the current manager. (That doesn't mean I don't 'support' the current manager when they are here in the narrower sense of the word, before you leap on that statement... )
Yes, of course, who the manager is has an impact on what happens on the field, but managers (and players) will always be transient so I tend not to waste too much emotional energy if/when they leave. I much prefer to save my irrationality for match days