Integrity is about being honest and open. Jacinda is standing up for what she believes in which is integrity and that you can be kind and also be strong. This is different from what you believe.
Being open and honest is associated by some people with being weak and being vulnerable. They believe someone will take advantage of you or walk all over you if you do not appear as tough and strong. That’s why there is not a lot of integrity in politics or business these days.
These views are linked to a certain view a certain view of masculinity and what it means to be a “real man,” that you have to be tough, to win and to be right. And it does mean someone else has to lose. It is a win/lose attitude, while Jacinda promotes a win/win way of thinking.