Since Star Wars fans were first introduced to George Lucas's galaxy far, far away in 1977, they've learned quite a lot about the Jedi Order. In the first film, Star Wars: Episode IV - A New Hope, these warrior monks were mysterious by design. Today, fans know the Jedi who follow the light side of the Force are committed to peace and protection, choosing violence only as a last resort. So, why did Obi-Wan Kenobi cut off poor Ponda Baba's arm in that first film just for hassling Luke Skywalker?
Source:https://www.cbr.com/obi-wan-kenobi-ponda-baba-arm-star-wars-a-new-hope/