Historically, the term "Ugly American" has been used to describe the American tourist abroad. We have a reputation for being self-centered, loud, inconsiderate and ignorant of cultural norms and customs, and generally tacky overall. In a lot of cases, that description is valid - a bull in a china shop, as it were. What's disturbing is that here at home there is a growing subset of Americans who revel in being inappropriate, offensive, and mean-spirited. Where we once were a nation of intellectual growth, ruled by statesmen, we have become "Idiocracy". We don't have a TV show called "Ouch - My Balls!" - yet - but there are plenty of videos on YouTube that meet that low standard.
Nothing seems to bring out the ugly like guns and race. Ever since President Obama was elected, there has been a concerted (ineffective) effort to prevent him successes and nullify (unsuccessfully) his triumphs. There was an immediate cry of "Obama wants to take your guns", and the stupid paranoid selfish American subculture swallowed it hook, line, and sinker. This has gone on for seven years, with attempts to quell any discussion of common-sense gun regulation after every bloody shooting spree, regardless of how awful.