Jiang Yi had never been someone who went looking for trouble; neither was he someone fond of flaunting his prowess and intimidating people. He was acting so unyielding and imperious for a reason.
If he wanted to live peacefully in the city, he would have to put up deterrence with his martial prowess. He had to become one of the chiefs. Sin Island was a place where the strong ruled supreme, and there were no laws to speak of. If one didn't show one's prowess, the others would think that person was a pushover and then come looking for trouble one after the other.
Thus, he killed Ba Dao, Chief Long, Long She, and the others. He then appeared while speaking in an extremely resolute tone so that the whole city could see his strength. He wanted to show the city the consequences of provoking him; he wanted to establish himself!
Hence, right now, he… wanted to teach Big Brother Heng how to be a proper person!