American Idiot song meaning
This song was strongly opposed by some people in the US because of its controversial lyrics that express the author's attitude towards the George W. Bush administration, as well as certain relevant political and social issues. Some people believe that this song is anti-American, because of its title and harsh sarcastic comments. However, if you pay attention to the lyrics you may see that in many ways the song is highly patriotic.
The title of the song is referring to the author's opinion that these days politicians and the media are telling us what to do, what to buy, what to believe in. We are constantly being subliminally mind-fucked by commercials, campaigns and reality TV. They turn us into idiots with no individuality. In this song, the narrator is saying that he doesn't want his nation to be turned into complete idiots, he doesn't want his country to be led by a redneck president ("I'm not a part of a redneck agenda"), doesn't want people to be convinced that it's right to hate someone because of their sexual preferences ("maybe I'm the faggot America"), doesn't want the nation to be isolated and detested because of stupid decisions that the government makes ("Welcome to a new kind of tension, all across the alienation").
This song is an overview of the album's most important ideas, as well as a sort of a warning calling out to the people across the country: don't let them take away your personality, don't let them turn you into Idiot America.