Wahhabism, a doctrine that promotes fundamental practices of Islam, was established by Muhammad ibn Abd al-Wahhab. Today, Saudis are spending billions of petrodollars to promote this intolerant, violent and fundamentalist view across the globe.

And with the gradual spreading of this doctrine, militancy is on the rise.

Here, a former militant confesses how he was mobilized and inspired to join the militants by the preachers of Wahhabism in Saudi Arabia.

Find the interesting yet fascinating story in the Frontline documentary Bitter Rivals here: https://www.pbs.org/wgbh/frontline/fi...