Utter drivel.
Sadly all too symptomatic of the modern fan - even if you, as a fan who has been about for a bit, ought to know better.
A persistently poisonous atmosphere has never helped a team to improve its performances - even if there might be a few individual players who are sufficiently defiant and contrarian to respond with "fudge you" style good performances (and one thing you can virtually guarantee - those few characters will be off to greener pastures at the first opportunity).
What it comes down to is your selfishness. You don't like a player. You think that he isn't trying in games or in training (despite the fact that you haven't got a fudging clue about whether he is or not). So you boo. Because you think you are the last word in motivation (when, in reality, you know fudge all). Because you think that it is your right; what you have paid for. Because you've become a spoilt brat.
You'd happily take the team into a spiral of worsening performances and confidence crisis so long as you can slag and carp and booooooooooooo to your heart's content. It's all about indulging your hurt feelings and prejudice against certain players and the manager. fudge the team. You're all that matters. Nice.