I think our definitions of really, really, really not nice might differ.
Ok, think of it this way. You went to Carolina. If someone told me that everyone who went to Carolina was the absolute worst, I would take issue with that statement because you went to Carolina as did many people I knew and liked/admired in high school. Most people who went to Carolina are the absolute worst but it is unfair to lump everyone into a negative category merely because, for whatever reason, they were sentenced to 4 years in Chapel Hill. I also feel it is unfair to lump Canadians who are the absolute worst (I mean, there is definitely and overlap between 'Canadian' and 'Carolina alum') into a positive category merely because of their passport.