Guys, I don't think we should read too much into the booing of Vettel at Monza.
He was driving an opposition car in the heartland of Ferrari and won the race.
Just as in my Jim Richards video, similarly was a case of a Nissan winning Bathurst in the heartland of Ford and Holden. Richards has since become a respected folk hero here, I suspect the same may happen to Vettel in time.
It may not be "classy" but it is people (possibly a tad inebriated) letting off some passion for their hero's and not being enthusiastic about them getting beaten.
EDIT: BTW, I'm certainly not a Vettel fan, but I do respect his driving skills.