When Stefan found out he was going to get killed, he reacted with anger and killed Roshan by accident, everyone watched Stefan kill Roshan, and have decided to gang up on him and execute him themselves
While kai was contemplating their life choices, they soon realized that they needed to join their love, and their love was Roshan. So kai's edgy ass killed CanadianBaka, after a while, the remaining 6 found out who murdered CanadianBaka, and they all stabbed kai to death xd