For 30+ years I have reasoned with my brother about the errors of the WTS policies.
Biblical contradictions to the WTS ever changing theology. The whole 'Lying for the Truth'tm thing..aka theocratic warfare.
His reasoning ALWAYS came back to a circular argument which totally deflected what ever issue was being discussed and brought up another point of contention.
Dismantle that point and another is brought up without an acknowledgement of the initial 2 or three points which had been proven false.
You will not reach them without first letting them figure it out on their own first.
You cannot control their decisions, but you can always ask God through prayer and that is never a wasted effort IMsomewhatHO
ttwsyf