Tipple said Tarrant "absolutely should not" have had any weapons.
"If we allow him to make changes in our ideology and behaviour, he has won," he said.
"We are not a country of emotional responses. We are a country of laws. What we are doing is legal and the majority of people... are abiding by those laws," he said.
"This gunman wants us all to be at each other throats. He wants us to return to 15th Century England where we hang, draw and quarter each other because we don't have similar beliefs," he said.
'Let's move on together, because together we are a much stronger force than divided. Let's not rip each other apart because we have a difference of opinion."
Prime Minister Jacinda Ardern has said gun laws will change as a result of the mosque shootings.