There's some fairly large amount of NZers that interact on the daily (some on the hourly) with Facebook. I dip in from time to time to read what people are saying just to try to keep some perspective on why it seems so many of my fellow citizens have such strange ideas.
For the most part replies and discussion on just about any topic are full of false assumptions, minimal facts, naked and unquestioned bias (x is always bad no matter what, y always good etc) and then the usual racism, misogyny and nastiness. This sort of crap from Winston appeals to that sort of folk, really he's just targetting a little lower and more broadly than his usual tactic of talking to the 70+ old white racists.