I can understand being an atheist. I think it's another thing to bitch about her not doing something she is genuinely and observably worried about (and which many of her viewers, myself included, were worried about.) Pippa has done a lot of things she didn't want to do because she wanted to keep her obligation. This one is much more serious, especially given her possible hallucinations/haunting/etc. stuff in the past and around that time.
I felt a lot of anger when i saw that screenshot just now, and I think back on the times i've said and done really stupid things also. I know that its been over a year (that's insane, doesn't feel like that long ago) and i don't monitor lolcows like some of you so idk if maybe he has changed in any way - if not I hope he does.
I guess if you're approaching it from the worldview that it's all in her head, that her seeing stuff out of the corner of her eyes was a brain problem or something, then it makes sense to be confused about why it's serious to her - and you'd think someone who has a shrine to her would care about how she actually feels or what she believes.