The whole thing seems to have been about if the guy went too far in subduing the homeless dude who was by all accounts acting crazy and aggressive towards other passengers, including a woman with a child with her.
It's so crazy reading different characterizations of the situation. Some are saying how the guy heroically saved other passengers by strangling an aggressive homeless dude for six minutes, even after other passengers had apparently left, others are saying how a vicious white attacker decided to murder a desperate BLACK victim of the system without any reason.
Wild shit.