Can't speak for everyone obviously, but I would have thought it would make people very happy indeed.
It makes me laugh when people say football fans are fickle. There's nothing fickle about praising someone who gets it right and complaining about someone who gets it wrong, it's perfectly reasonable. At the moment it seems to me that Koeman is failing at his job - we play awful football and rarely win, so i'm not very happy with him. If I could see what he was trying to do in the long run but it just wasn't quite happening then I'd cut him a lot more slack, but I'm struggling to see any positives at the moment so he's not on my christmas card list. If he starts producing the results he gets paid for then my opinion of him will change. If he wins us a trophy i'll love him forever and name my first-born RonKo in honour of him. I've got no agenda to push, I just want Everton to win as many games as possible.