I agree that the act of shunning does not mean that the shunner does not love the shunnee.
What is means is that the shunner loves something more (God, the Cult, their social standing in the Kingdum Hall, their friends) more than the shunnee.Unfortunately some of these are misguided.
We know that we love someone or that we are loved by the actions we give and recieve. If you totally cut someone off from your life then you have clearly made a choice that some issue or something else is more important than that relationship.
These are choices each individual makes, our choices show who and what we love the most.
Just my 2 cents.