Collins has a confrontational manner. She enjoys the put-down method of dealing with what she doesn't like and can dish out as good as she gets. Whether it will serve her well waits to be seen. If she wasn't "boorish" on this occasion she has been on others. Personally I balk at deliberate rudeness. It's unneccessary.
Too much time is spent in public institutions observing Maori cultural traditions that, on balance, serve no positive purpose but she's intentionally making a mountain out of a foothill. The place she walked out of, a CYFS youth centre, is about kids. It's about their (probably) last chance to get a life, to turn around. Getting into a row with the kaumatua shut down any possibility of working together.
I supported Josie Bullock's protest which she went about with dignity and reason. With any cause there are good advocates and bad ones. Being right doesn't give licence to behave badly. And on occasion there is a bigger issue than the barrow you are pushing.