Don't read too much into it. The Iranian dictatorship is considered by the vast majority of the Iranian populace as fundamentality Arab in culture even though they're ethnic Persians.
No, you have it wrong. The Persian muslims in Iran are Shiite, and have always had a dislike for the Arab Wahhbi's who they consider "lovers of the anus" from the time of Ali.
Wow .. that's just too bad. I'm fresh out of pity for arabs or muslims.
These folks are, I guess, Shiite Arabs
Not necessarily
https://www.cia.gov/cia/publications/factbook/geos/ir.html
Ethnic groups:
Persian 51%, Azeri 24%, Gilaki and Mazandarani 8%, Kurd 7%, Arab 3%, Lur 2%, Baloch 2%, Turkmen 2%, other 1%
Religions:
Shi'a Muslim 89%, Sunni Muslim 9%, Zoroastrian, Jewish, Christian, and Baha'i 2%
A bit off topic
Sometime take alook at how (our good friends) the Saudis have treated the Shi'a living in SA.