If fans don't want to boo that's their personal choice. The demonstrable fact is that a significant majority ARE booing, and I've yet to see anybody castigated for refraining.
Who cares about UEFA? - we all should. They run football in Europe and their influence is considerable. The choices they make affect not only the top clubs, but all levels of football in Europe, right down to kids in schools. They allocate the budgets (or more accurately decide how to split the funds). They decide on the rules. They set examples.
We aren't bothered about UEFA the institution, we're bothered about governing of football, which happens to be implemented by UEFA in Europe.
If you care about football, you ought to care about UEFA. It's no different that in you care about society, you ought to care about politics (however distasteful that sounds!)
We can't change much in football, and we should probably attempt to change a lot more than we do, but the reasons behind the booing are legitimate and worthy. It is in no way indicative of our support for the team. The two are entirely different matters, and the team know this.
Do you think fans are booing because of how they split the funds or because of any rules that have changed?
I'm more bothered about Kompanys fitness, trying to get 4th, Sterlings price tag, Ottamendi diving in and beating Stoke on Saturday just to name a few!! rather than this morale crusade that makes us look a little bit small time.
Like you say it is a personal choice and I do respect the right to boo and understand why some fans do it.