[Nursie]

I believe the account is a troll, in the earlier internet definition, someone that goads others, often for the sake of contrarianism, often to make them say odd/unsupportable things in response to seemingly reasonable or mild posts.

When they're good, they have been performance art. I wouldn't rate this one particularly highly though.

[mercer]

"You can call me all the adjectives you want, but I do not care if earth explodes after I die. I just don't. I care for my benefits during my own life. I've said this before and I say it again, I do not have any moral problems with sacrificing other peoples benefits for my own benefits and neither should you. Doing this is insanity. Would you starve yourself to death so you can feed other people? Why should I care for other people? It's a silly notion. Maybe I'd care a little bit if I had children, but I don't."

I'm a bit surprised at how people spend energy engaging with this commenter without checking their history. Anyways, I really do hope it's a troll.