Who is this idiot, anyway? Some rube from down at the Overcoming Spirit Baptist Church on the frontage road?
Just do a Google search for the word Catholic and any weasel word like cult/conspiracy/scandal - and you'll hit tons of these nutcases.
Want to have great fun while wasting their time? Act like you're a person interested in "conversion." Lead them on in email...then start asking questions and challenging their hollow doctrine.
You'd be stunned by how quickly these snake handlers degrade into profanity, anger and threats.