Basically, he’s short-tempered and takes it upon himself to enforce the social contract through outbursts of violence.

The more you read, the more right he becomes. He also beats a duded up dandy for man spreading on a trolly.

For the crime of seeing an empty train carriage and going to sit directly next to her, when her expression makes it clear that she’s uncomfortable with that. If you want to sit and make conversation, sit across the aisle, make a comment that has either the option of being picked up for conversing, or politely dropped, so that you’re not pressuring someone into something they may not be comfortable with (talking with strangers).