Islam looks different in each of these regions and countries, largely because as it spread, people imbued it with their own local customs and traditions. The Sufi Islam practiced in northern India is quite different from the Shi'a Islam practiced in Lebanon, which is in turn different from the Sunni Islam practiced in Pakistan. Even within a single branch of Islam there are customs and practices that vary by region and across time. Thus, the Islam of seventh-century Arabia is different from the Wahhabism that exists today in Saudi Arabia. Religious texts may be more or less fixed, but all of the world's religions, including Islam, have changed and adapted based on historical transformations.

Deepa Kumar, Islamophobia and the Politi…, loc. 160