This is a very interesting topic, because this sort of jersey selection has plagued many cyclists from an ethnic, national, or any other perspective. I'm speaking from the United States, where its much different than in Europe, but still an issue none the less.
The last Euro incident that I can remember is that a Hungarian cyclist got beat up in Romania or Slovakia because he was wearing the Hungarian National Champion jersey of Laszlo Bodrogi when he was riding for Mapei.
I know when I ride here in the US, nobody f*cks with me anytime I wear my red, white, blue BROOKLYN jersey that De Vlaeminck made famous in the 70's 4 ROUBAIX! Little do they know it's an Italian chewing gum. Ha ha! But if you wear World Champ stripes, your a f*ggot. If you wear the Maglia Rosa, your a q*eer. that's the kind of ignorance I have to deal with in the U.S.
Whatever, just ride your bike! As long as it doesn't get you beat up!