Although there's always some arsehole in the U.S.A that has a wanton desire to destroy their own country from within

Yes, the USA is full of these kinds of people. Usually they have never gone abroad for any extended period of time and simply want to mess up things for others because they are bored with themselves and the world they live in. The poster "new jersey" and "curicua" fit the description quite well. Although that "new jersey" poster may have been WW.