What is Wahhabism? Where does it have the most influence?

In July 2013, Wahhabism was identified by the European Parliament in Strasbourg as the main source of global terrorism. Wahhabism has become increasingly influential, partly because of Saudi money and partly because of Saudi Arabia's central influence as protector of Mecca.

Explanation:

answer; i believe that the correct answer is ; the eastern and western churches spoke different languages;