22. San Diego, California (3.5%)

San Diego is another supposedly rude city, according to one angry resident brave enough to write and publish an opinion piece on the matter. Stuart Cardwell aired his grievances for the San Diego Reader in 2016.

He explained that a local college professor told him rudeness could be blamed on a variety of things, such as the gold rush, the Dust Bowl migration and the idea of manifest destiny. That sounds like a “college professor” thing to say.