I think a lot of the problems people have had with Rochelle's posts have been because people use 'paedophile' interchangeably with 'child abuser', and talk about 'convicted paedophiles' etc.
By my reading, Rochelle was trying to be more precise with her language - not all child abusers are paedophiles, and not all paedophiles abuse children; being a paedophile is not a criminal offence (as you can't see what people are thinking), and the actual criminal offences relate to child abuse, such as perpetrating the abuse or viewing images of the abuse.
The people who asked why someone who was not a paedophile would want to look at images of child abuse, there are, for example, people who just like looking at abuse and don't care if it is adults, children or animals. It does not make this any less harmful.
Saying someone who is a child abuser may not be a paedophile is not minimising the abuse - the abuse took place anyway, the abuse was the crime, the abuse was what harmed the child.
However, in many ways this discussion would probably be more suitable for Pedants' Corner than Relationships, as it does not really help the OP resolve her problems with her family member.
IMO, NC is the way. My brother is an abuser, and I have not been in the same room as him for many years. If I am speaking to another family member on the phone and he is with them, I end the call. I stop my mother if she starts telling me about him. I don't want to know - he is dead to me (although, unfortunately, not actually dead).