I have reached the stage where it no longer affects me hardly at all when they go in to cult mode and do the old " return to J" nonsense. I simply respond in a polite way, which gives no validity to their beliefs in any way.
It is frustrating that you simply cannot have a normal conversation with them, where your point of view is accorded the same respect as they expect for theirs, and I find it a strain that I have to be so careful what I say lest I offend them, and they decide never to speak again. But that is the way it is, it is unfair, one sided, but Cults do not do fairness, along with many other things we normal civilised people do.