The tone in America evolves quite radically from cocky to concerned, and the language is informal (full of elision), nondescriminating towards swearing- selectively descriptive - the only really metaphorical line I could find was "in the light of 500 suns", and blatantly honest (I go to chinatown).
Repitition is really the only true poetic device of this poem, and gives the reader the impression that each line is separate from the others, as if the poem itself, is simply a collection of one liners Ginsberg has spouted or perhaps heard at one time or another, and glued together with a common message.
In the first two lines, America and the world have obviously just been through world war 2, and are in the midst of the cold war against Russia. Allen Ginsberg basically communicates his doubt that america's is the only and right way.
The poem is basically divided into three tonal and attitude verses. In the first, Allen Ginsberg appears quite overly infantile and immature in his response to America's actions, as if he isn't a part of them. He speaks as if America is his parent- or a separate entity to