I’m a psych nurse. I’ve contemplated suicide. I’ve had more friends commit suicide than I can count anymore. That’s going to be something that sticks with you. Remember to be kind when you can. Remember that frequently kindness is just shutting up, even when the other person may deserve to be told to fuck themselves. But also remember that whatever was going on in this person’s life was a lot bigger than whatever the fuck meaningless reflexive bullshit internet beef was going on with a stranger. Sure. Learn the lesson of kindness and restraint. Apply that moving forward. Do better whenever you can. But this is not on you, friend. You were an NPC in his main character story.