The JWs claim they are the true christian religion even though they only appeared suddenly and very recently. But what is it that connects them with the early apostolic church so as to make it possible for them to claim they are its successors?
Indeed if we check out their history we see that their immediate predecessors and teachers the Adventists were rejected by them as a false religion, they believed in hellfire and the immortality of the soul. So we can't even find the link that just preceded them which surely invalidates their claim that they ultimately originate from the apostolic church. There is simply nothing connecting them to the apostolic church and validating them as the "truth" they claim to be.
Something useful to point out to the JWs when they argue that they are the true christian religion.