Muslims are very active in missionary work. They have strategic ways of spreading Islam in the world. In Islam, their mission doctrine is called Dawah. Before Arabs found oil, they were focused on aggressive action and direct Jihad in order to spread Islam.
However, since the collapse of the Ottoman Empire, after WW1, and the discovery of oil in Saudi Arabia and the Middle East everything has changed. Many wealthy Islamic counties use money to manipulate governments and individuals within these governments to promote their branch of Islam in a particular county.One of the missionary approaches in Islam is immigration.
In Islam, the term hijrat or hijra is well known because of the prophet of Islam, Muhammad’s migration. For more please read The Muslim Next Door by Dr. Alfonse Javed page no. 20.