I'm torn on this, because i used to be the kind of moralfag he's talking about. I don't think i was ever trying to be "moral"... i was trying to be "right."
It was never about spreading positivity or doing the right thing, it was about how much better i was than the people i disagree with.
If you try to live morally and fail, at least you tried
But for many people it's just an act or clique, and i think those people are more malicious than some idiot acting on impulse that has never even considered his own morals.
It's so retarded to look at the beliefs you copied from the internet at 15 and say: "yep, this is infallible and everyone else is evil"