Lines in the Sand, directed by Carol Archie, actually centres on another woman who stirred up te reo rage - another "gentle revolutionary" as writer David Slack put it on Monday. Singer Hinewehi Mohi was lambasted for leading the national anthem in te reo and not English before an All Blacks world cup game in Britain in 1999.
The documentary suggests that had she asked to sing the anthem in both languages, the answer would have been no (unlike in international netball, where the anthem in two languages had been the status quo for years). Again happily, Mohi's stand helped fast-track the current custom of singing the anthem twice at official occasions, first in te reo and then in English.
These stories are both horrifyingly recent, but they also give hope: positive change can happen, and it can happen through people power. (Even if it's three steps forward and two back.)
As Glavish stressed at Monday's discussion: "I began the battle but actually it was the country that won the war."
The support - tautoko - she received from both Maori and non-Maori was overwhelming.
Airline pilots greeted passengers with "kia ora"; people rang the switchboard wanting to talk to the "kia ora lady".
One panellist, writer Te Awhina Arahanga, would like to see us showing more of this trust and "more faith in each other, and not continual judging". Unity not uniformity; empathy not forced conformity.
So, we've gone from kia ora 28 years ago to the anthem 13 years ago. What's next?
Archie hopes for a more real, vital partnership with Maori, with political clout. Another panellist, kaupapa Maori architecture specialist Rau Hoskins, said making Matariki a national holiday would be "a mark of maturity" and he expects it to happen within five years.
Now, even for those reluctant to work together, that's an incentive worth changing attitudes for.