The Iranians are Persians, not Arabs. The animosity between the two goes back centuries. Because they are Shi'ite (where does that damn apostrophe go?), they believe that Muhammed was not the last prophet. The Sunnis (generally) believe he was. Muhammed was more or less a thug who knocked over caravans and stole the goods. Because he "saw visions" and "heard voices" (hell, in my...errr...more chemically induced states, so did I), he got religion and somehow knocking over cavavans for their goods became the Holy Occupation of Knocking Over Caravans and Taking Their Goods As Long as Muhammed is The One Doing It. The Koran itself is not bereft of decent meaning, regardless of where it came from.