The modern Persians are mixed with Arabs, making them partially Semites. This has a lot to do with the Islamic conquests, rapes and intermarriage that followed with it, producing a considerably mixed race.
Anyhow, many Iranians considered themselves Aryans, even though the true Aryans come from North India and have little connection with Germans or Iranians. They actually say the Jewish people have more pure Aryan blood than any person of German/Nordic descent. Hitler adopted the Aryan theory of racial supremacy, which existed in some of their liturgy and morphed it with his goofy nordic pagan religions and Lutheranism, which was also a religion of which he was a great admirer.
For those who don't know, the Nation of Iran actually support Hitler during WWII, although not everyone, including their leader, agreed with his beliefs on exterminating the Jews. However, they happily aligned themselves with Hitler as an Aryan brother, as many Persians adopted the Aryan theology and morphed it with their own religions as well, even though they too, are not true Aryans.
The true and purest of all Persian lineage came from the Shah and his royal family, who remained the most untouched by the Arabization and colonization of his country. Hitler had admiration of the Shahs of Iran and considered them almost as brother Aryans.