No, all art is NOT a societal statement. Some art is historic, some is just for the sake of beauty. This "art" was specifically chosen by Henry Fonda for it's "societal statement". He was a commie just like his officious offspring.
But you are correct, the object was an attempt to typecast, just like the socialists today attempting to typecast Tea Partiers and Conservatives. Your refusal to accept that reality is a pity.