Usually patriotism is the last justification used by those who have nothing else to stand on, like the KKK trying to oppress African-Americans, or the Nativists trying to oppress Irish immigrants, or modern-day politicians who decry all Islamists as terrorists, or the border states trying to oppress migrant workers, etc. Each time they've exhausted all other excuses, Patriotism is the last justification for their actions. (I won't touch on Mao, Stalin, Hitler, etc because they're too tied to specific nationalist policies)
Personally, I wouldn't want to identify myself as a Patriot, because usually they're the ones standing on the wrong side of history.
Unless you were just trolling.... ;-)