The most extreme faction of Kharijites was that of the Azariqa, who condemned all other Muslims as apostates, also known as the process of takfir. The Kharijites were particularly noted for adopting a radical approach to takfir, whereby they declared other Muslims to be unbelievers and therefore deemed them worthy of death.[13][14]The Azariqa controlled parts of western Iran under the Umayyads until they were finally put down in 699.