When Mr Brash was asked if he had reflected on the use of te reo Maori in today's society and on stations like RNZ, he said he hadn't changed his views fundamentally.
"What it did illustrate is that many Maori parents themselves wanted their kids to become fluent in English because it is the passport to modern New Zealand.
"I can see why many people think learning it is a very important priority. I guess my view is that for every single New Zealander, no matter what their ethnic background, having a strong knowledge of English is a fundamental value," he said.
Mr Walker said he did not expect Mr Brash to change his opinion overnight and making the effort to come meant he was engaging, which was a good thing.
"What he could not fail but take away is that Maori tikanga is so important to a lot of people, the kids especially, but also the audience. There was a lot Pakeha there and they were just as blown away. Don Brash doesn't really represent mainstream Pakeha," he said.
Waiora was first performed in May but was brought back for a second season following demand. It has been so popular two extra shows were held on Thursday and last night.