Muhammad.
Africa, Asia, and allover the world.
Yes, and the Muslim warriors did too....
Religion is usually spread by one person impressing another person with their good character, kind heart, and inner glow.
A zealot.
The religion of Islam was spread. (study island answer)
Allah created Muslims so they can learn and embrace his religion. A true Muslim learns the Quran, spreads the word and the religion of Islam, and to have children that grow up to also spread the word of Allah and the religion of Islam.
muslim merchants travild sending religion with them
Through the power of the Holy Spirit and committed Christians who lived their faith and preached it by their way of living. That is what converted the Roman empire.
A missionary
Islamism is a modern movement and did not exist in the 8th century. If by Islamist, the questioner intends Muslim, the Muslims spread the religion of Islam and expanded the borders of the Islamic Empires through expansionary conquest. It is worth noting that a Muslim is a person who believes in the tenets of the religion of Islam. An Islamist is person who advocates the political goal of making a country follow Islamic Law. Most Islamists today are Muslims, but most Muslims are not Islamists.
Askia Muhammad promoted Islam in Songhai by establishing Islamic schools, encouraging the spread of Arabic language and script, and appointing Islamic judges and officials. He also supported the pilgrimage to Mecca and welcomed Muslim scholars and traders to his empire, thus fostering the growth of Islam and education in the region.
A preacher or a missionary.OR if its in forceful ways its a terrorist or a crusader.But really anybody who is religious and talks about it works to spread his religion