One means is via dawa - the proselytization of the politico-military-legal doctrine of shariah.
CENTERFORSECURITYPOLICY: The King Hearings were Taboo-Busters
2.
The instigators were Islamists seeking to impose the supremacist, totalitarian politico-military legal program they call shariah.
CENTERFORSECURITYPOLICY: Second thoughts, from Goldstone to the 'Arab Spring'
3.
He acted in that capacity for seven months during which time, he was the Chairman of the prestigious High Level Group, NATO's senior politico-military committee.
CENTERFORSECURITYPOLICY: Center For Security Policy