Seems like Milan has surpassed Inter even in Italy.
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Napoli "taking" or winning a lot of "fans" from Juve and Inter.
Roma and Napoli "finally" "ruling" their home ground, central and south respectively.
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The most hated club. Juventus becoming the by far most hated club again.
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Juventus the most hated club among fans of both Milanese
teams, but what's really surprising is even Roma fans see Juve
as a bigger rival than their city rival(Lazio). Possibly because of
the newly recruited fans outside Rome/Lazio.
But as you can see, a lot of it has to do with results. More success ---> more fans, more haters. Less success ---> less fans, less haters.
What surprises me though is Milan were more popular than Inter in North-West "even" in 2011. I think there are a lot of Milan fans in Liguria and Piedmont, especially Torino.
A lot more interesting stuff revolving Italian club fans here.
http://www.demos.it/a00756.php