Ah a kindred spirit!
I did what you are doing. I spent a couple of years allowing myself to bounce in and out of some of the various cults…
I was raised Mormon. I no longer believe, but practice tolerance. It’s that or be ostracized from loved ones… sigh.
Anyhow. In order to deprogram from Mormonism to a sufficient level where I could begin to think on my own two feet, I studied and met with Eckists (new agers), JW’s, Catholics, Muslims, Evangelicals, Jews and oh yes… Scientologists. It was exhillerating and enlightening. The more I learned that ALL OF THEM were equally convinced that THEY were the only true representation of God on earth just as I had been re: Mormonism… only then did my mind begin to allow for freedom of head space.
The JW’s are steeped in cult-speak and are quite entrenched from various mind control techniques. Nothing new here. Your bantering with them might be most effective if you stick to the one salient point that ALL religions with powerfully forceful exclusivity claims to defend have crackpot science and scientists who are able to twist and turn all sorts of posture into “proofs” that THEY ALONE hold the one and abiding truth that the rest of the world just doesn’t seem to get. They ALL do this. They ALL have online forums that “PROVE” how true they are and how false the rest are… well, maybe not the Jews but you get the idea.
It’s hilarious. and fun.
Start by asking a question that frames my last paragraph then ask “If the WatchTower group was false, would you want to know?” and follow with “If the WatchTower group WAS FALSE… how would you know?”
Before you go toe to toe with them, I suggest you read Steve Hassan’s “Combatting Cult Mind Control”. It’s extremely well written and will serve as great primer for discusssion. Hassan’s deprogramming from the Moonies is a fascinating read.