Yes. Both things exist.
Arabs are people of the Middle East that are united by a common language: Arabic, and a common history: the Islamic Caliphates. Arabs are not necessarily of the same ethnic stock and in many cases are of mixed heritage due to intermarriage between the Arabs coming up from the Arabian Peninsula and indigenous Semites and Berbers. There are roughly 440 million Arabs in the world. Not all Arabs are Muslim, even though >90% are, but all Arabs have (in their history) spent time under an Islamic government.
Islam is a religion that prevails in numerous parts of the world (Middle East, North Africa, some of South Asia, the Indonesian archipelago, and parts of Sub-Saharan Africa) that is held together by common beliefs about how there is one God who expressed his final revelation to an Arab Prophet named Muhammad. There are roughly 1.6 billion Muslims, followers of Islam, in the world.
The Arabs and Muslim have contributed immensely to the spread of Islam by spreading it to other continents such as Africa. A Muslim is a practitioner of Islam, so if Muslims did not exist, Islam would no longer be practiced (just like the Ancient Greek Religion with Zeus is no longer practiced). The Arabs were the first Muslims and were responsible for spreading Islam throughout North Africa and the Middle East.
Islam.
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