What are two examples of cultural diffusion in Islamic civilization

Examples of religious cultural diffusion

Christianity started in Israel and has spread all over the world. An example of forced diffusion is the Afghans forcing the Nuristanis to convert to Islam. India is home to many religions: Buddhists, Christians, Muslims and Hindi. An example of forced diffusion is the Spanish, French, English and Portuguese forcing the native population of the Americas to become Christian. Islam has spread recently to the whole world. In China, during the Han Dynasty, Buddhism spread from India to China.