any suggestions that a jw can understand?
This is probably the biggest problem & depends a lot on the particular jw. The standard garden variety jw can't grasp anything that is not programmed in by their literature & meetings. The concept of being a Christian without belonging to an 'organization' is completly beyond them. So to them it is a simple choice of either belonging to WTS or Methodists or Catholics,etc,etc. Ray Franz introduced me to the idea that leaving JW does not mean we have to join some other religious organization. I read both of his books (a must read for all who will) & I kept waiting for the bottom line--WHERE WILL I GO? He even implied one could possibly remain a JW & still be a Christian (with some difficulty). We are judged as individuals, not by what organization we belong to.
But if the jw is not already receptive to thinking, I doubt that there is anything you can say to make a difference. It is the same frustration felt at the door when nothing you said got through. The WTS condemns 'independent' thinking, but anything other than 'independent' thinking isn't thinking at all, but is simply blind acceptance, which is what they want.