Like your sister'sbuttcheeks.
. An adherent makes a pilgrimage to Mecca.
Beloved prophet Muhammad (May peace and blessings of Allah Almighty be upon him) din't BRING Islam to Arabia. Islam dates back to the arrival of Hazrat Adam (AS) and Hazrat Eve Hawwa (AS) on the earth. Hazrat Adam (AS) was the first human being, first messenger, first Prophet and Rasool and the first Muslim. Then he was followed by about 12 million prophets, inculding Hazrat Noah (AS), Hazrat Abraham (AS), Hazrat Izak (AS), Hazrat Jakob .... Hazrat Moses (AS) and Hazrat Christ (AS), all preaching Islam. The last of the Prophets is our beloved Prophet Hazrat Muhammad (MPBABUM). The religion given to all human beings by God is Islam.Arabia before the Prophet-hood was a place full of sinful activities-idol worship, cruelty to women, burying alive young daughters, drinking, killing innocent people, and so on. Allah Almighty took pity on the Arabs and blessed Prophet Hazrat Muhammad (MPBABUM) with Prophet-hood for the guidance of the Arabs in particular and the whole humanity in general. He preached Islam and wiped out the evils prevalent in Arabia and adjoining countries. The message of Islam spread in the world later on.Read more: What_is_the_date_of_Islam
In Saudi Arabia
The Ka'ba is a cube-shaped building located at the center of the Great Mosque in Mecca, Saudi Arabia. It is considered the most sacred site in Islam and Muslims around the world face towards the Ka'ba when praying. Pilgrimage to the Ka'ba, known as Hajj, is one of the Five Pillars of Islam.
Islam did start in the so-called "Saudia-Arabia";
Islam spread from Arabia.
That's like asking why did Christianity start in Jerusalem?
Muhammad Prophet was born in 570 CE, in a small town in Arabia. Around 610 CE he founded Islam. Some people didn't like Islam so they forced Muhammad and his followers to flee to Medina in 622 CE. Within 10 years, the Prophet won considerable support and had a devoted army with him. When Muhammad died in 632 CE, all of Arabia had converted to Islam. Therefore, Arabia submitted to Islam around 632 CE.
Traders in Africa had contact with Arabia and converted to Islam
The main religion of Saudi Arabia is Islam
No, Islam began in Mecca city in current Saudi Arabia country. but later Iran absorbed Islam and highly supported and developed it. Islam is Iran is Shia Islam and in Saudi Arabia is mostly Sunni Islam.
Saudi Arabia
In Arabia the city of Mecca which is part of Saudi Arabia.
Islam, specifically Wahhabi Sunni Islam.
Islam started in Mecca Suadi Arabia
Islam Began In Makka(mecca) which is in Saudi Arabia.