It is pretty likely that they just did that and continue as if the session did not happen. They however don't want to play more socialise with him. Likely, and i am just guessing here, the issue is not just characters death, but also the way it played out.
According to his account, he noticed the other players were "disgusted" - something he decided to ignore. I dont know how their diagust manifested, but people who ignore shared disgust for their own fun are no fun to role play with. The disgusted group members likely said things that were ignored by him - did not lead to discussion nor two way attempt to undestand expectations. Their concerns were ignored.
This combined with the fact that he did not tried to talk with them afterwards to explain himself (not the same as apologise) makes me think the dudes social skills are not the best in town. He might have come across way more dismissive or insulting as he thinks.
When one player does his own thing with zero regards to how other players want to play or what they consider fun, the game becomes drainig to everyone else. I would expect conflict after such play and it is quite likely the mentioned disgust was that conflict - and the way it did not solved made people wanna socialize with less difficult people.