There is a group of monks who originally worshipped the god, Gorn. Gorn's prescripts prohibited the drawing of blood of thy fellow creatures, it did not prohibit the use of body to bring people into the light which is the Almighty Blessed Gorn.
These monks developed a series of skills based upon a bare-handed fighting style. Through speed and skill these fierce and faithful followers fight with purity of body and soul for the glory of Gorn. The prime requisite of dexterity helps a monk with their speed and skill.
Since that time, there have been factions which have split off and started worshipping their own gods. They have, however, maintained the practices that have existed for the past 2000 years.