Well I just think why do we "believe" him on this, is it just because it's a message that goes with what we would like or think. That's something that many people go to in the rush to support their positions just because they confirm whatever position they already held.
I just think he's not a good faith actor in anything he does and so has no credibility for me as someone to cite. Even if he somehow was telling the truth,I just can't rely on someone with his history it would need to be from someone with greater credibility in my view.
It can be easy to point to something and not dig to deeply when it supports your own position but the context of who is saying and for what reason etc also is relevant to me. Otherwise when he has a go at us he's clearly wrong but when he's saying stuff for us we totally think he's legit. It's not consistent in my view.
I think Neville is just being a shit stirrer makes great content to dig out Arteta and Arsenal that's basically it