I think the point he was trying to show is that she was an angry, spiteful and vindictive woman.
The wholesome, kind, thoughtful and jolly Paula Vennels who was a committed and upstanding member church and society was just a front.
I was struck by the way she never missed the chance to praise herself and her values. Even when presented with that ghastly email, she still maintained that it was a "mistake" and didn't align with her true values. It was as if someone else had written it.
As someone else said, religious people often have a lot vested in the fact that they are "good".
I can imagine people who dealt with her at public events may well find her approachable, engaging and interested. That woman is just an act.
The people who work with her day to day will quickly start to see the real Paula Vennels. That is the woman who wrote those horrible emails, who refuses to accept responsibility for her actions, who blames other people for their failings and, I suspect, has an absolutely foul temper. The only failings that she can see in herself is that she is "too kind", "too understanding", "too patient".