we have to use their format to show them there has been a big deception. they have been tricked.
But they haven't been 'tricked' in the manner you say they have. In regard to the deity JWs worship, they have only been 'tricked' as much as any member of any Abrahamic religion. The claim that 'Jehovah = Satan' isn't any kind of explanation. It's just wrong.
There are plenty of ways of showing JWs objective things about their beliefs rather than quibbling about subjective semantics.
How about the anthropological evidence of continuous civilisations all over the planet long before the timespans posited by the 'Noah's Ark' or 'Adam and Eve' stories (both of which they take literally)?
How about the great amount of evidence showing that not even the Bible supports their beliefs about 607BCE?
What about the many (many) contradictions found in the Bible?
etc