Do you mean "jingoistic"?
That's a general matter. Where does patriotism start and where ends normal feelings like optimism.
We, as far as i am concerned, in germany aren't patriotic, and we never could allow us a patriotism like for example it is practiced in the united states.
I don't want to comment that further, because every one knows the deal... But what i like at the footbal thing is you can cheer for your national team without beeing provocated about history or sth. And OF COURSE do you believe your team will win! What are you for a fan if you say, hey, this guy is arrogant, he believes his team will win?!