No. Persians and Arabs are distinct ethnicities.
Persians are an Indo-European people who speak an Indo-European language (like most Europeans) whereas Arabs are a Semitic people who speak a Semitic language.
Arabs converted to Islam before Persians did. By 633 CE, almost all Arabian Arabs were Muslims, but almost all Persians were Zoroastrians.
Arabs
Persians
Arabs (420 million) are more numerous than Kurds (35 million) and Persians (70 million).
islam
Kurds, Arabs, and Persians are ethnic groups that are primarily focused in the Middle East. Kurds are overwhelmingly Sunni Muslims, but there are minorities of Shiite Kurds (especially in Iran), Alevi Kurds, Yezidi Kurds, Yarsan Kurds, and other religious minorities. There are some Jewish Kurds who predominantly live in Israel. Arabs are predominantly Sunni Muslims, but there are large minorities of Shiite Muslim Arabs, especially in Iraq, Bahrain, Saudi Arabia, and Kuwait. There are also Ibadi Muslim Arabs, Alawite Arabs, numerous Christian Arabs, Druze Arabs, Baha'i Arabs, and other minority religions. Persians are overwhelmingly Shiite Muslims, but there are minorities of Sunni Persians, Jewish Persians, and several other minority religions.
Kurds, Arabs, and Persians are ethnic groups that are primarily focused in the Middle East. Kurds are overwhelmingly Sunni Muslims, but there are minorities of Shiite Kurds (especially in Iran), Alevi Kurds, Yezidi Kurds, Yarsan Kurds, and other religious minorities. There are some Jewish Kurds who predominantly live in Israel. Arabs are predominantly Sunni Muslims, but there are large minorities of Shiite Muslim Arabs, especially in Iraq, Bahrain, Saudi Arabia, and Kuwait. There are also Ibadi Muslim Arabs, Alawite Arabs, numerous Christian Arabs, Druze Arabs, Baha'i Arabs, and other minority religions. Persians are overwhelmingly Shiite Muslims, but there are minorities of Sunni Persians, Jewish Persians, and several other minority religions.
Islam (muslims)
The Turks, mongols, Arabs, Persians, more Arabs and barbarians.
No. Pashtuns are a Central Asian people and share much more in common with Persians, Kurds, and Qashqai then with Arabs.
Yes. Most Arabs and Kurds are Sunni Muslim and most Persians (Iranians) are Shiite Muslims, but there are many religious minorities among all three of these peoples. Many of those minorities are oppressed in some or most of the nations where these peoples live.
Almost half of Iran blong to the Persian nation/language. However not all Iranians are from Iran and not all Iranians are persians. Furthermore, most Iraqis are Arabs.