Adam had been trying to be respectful to William and although it seemed that he cared for Cole, in their younger ages, he was hardly ever there to support and care for his son. He also never seemed to like him or treat him well, so Adam had no reason to try and please him.
Releasing his killing intent and Bloodlust, Adam glared straight into William's soul, causing him to shake in fear and stumble backwards.
"Adam, stop this please," said Cole as he placed his hand on Adam's shoulder.
"Hahaha, sorry bro. I got a bit carried away" apologised Adam, who didn't want to anger his friend/
Cole helped William up and didn't reprimand Adam for what he did to him, as his father was the one that was acting too arrogantly for no reason and was the first to strike. If it were any other cultivator and William attacked them for no reason, they may have severely injured him or even killed him for his arrogance, so Cole was grateful to Adam for not reacting in that way.