Islam religion was not introduced by Arabs. It is God religion introduced by God since start of universe creation and even before.
Islam is an Arabic word that means submission and surrender to God (as the one and only one God). Accordingly:
if you mean Islam in its general sense, then Islam began by the universe creation where all God creatures were created under their submission (Islam) to God. Upon start of mankind, they are taught through God prophets to be on full submission (Islam) to God. Islam is then introduced through the period from universe creation until prophet Muhammad (peace be upon him) death in year 632 AD.
All prophet missions; including Noah, Abraham, Moses, Jesus, and Muhammad, was to hold submission (Islam) to the one and only one God, the Creator, with no partner, no son, no father, no companion, no associate, and no resemblance (defined as monotheism).
In this sense:
If you mean Islam religion per God revelation of Quran to prophet Muhammad, then it was founded by the start of Quran revelation by God to prophet Muhammad through the Angel Gabriel (Jibril) in Mecca (or Makkah; currently in the Kingdom of Saudi Arabia) in year 610 AD. Quran revelation continued also when the prophet (peace be upon him) migrated to Medina (also in the Kingdom of Saudi Arabia) until prophet death in year 632 AD. So, Islam continued from year 610 AD through year 632 Ad (year of prophet Muhammad death). The core Islam message is to worship only One God (The Creator) with no partner, no son, no companion, and no associate. Prophet Mohammad came to re-institute, the religion of Adam, Noah, Abraham, Moses and Jesus.
Islam.
numerals
Yes, Arabs were polyethnic at that time.
Arabs converted to Islam before Persians did. By 633 CE, almost all Arabian Arabs were Muslims, but almost all Persians were Zoroastrians.
No. Arabs are typically Muslims, and Islam forbids the consumption of dogs.
Islam.
numerals
Arabs brought Islam to Africa.
Christianity and Islam
Islam.
There is only one kind of Islam religion and it did start in Saudi Arabia and Arabs were the first Muslims
Yes, Arabs were polyethnic at that time.
Islam, specifically Sunni Islam.
They believed Islam to be moral and desirable.
Arabs converted to Islam before Persians did. By 633 CE, almost all Arabian Arabs were Muslims, but almost all Persians were Zoroastrians.
No. Arabs are typically Muslims, and Islam forbids the consumption of dogs.
Islam