"they want to help and protect the congregation"
This means that you have already been marked for judicial action for the worst of sins, "apostasy." They seem interested in "saving" your wife or at least trying to determine if she also requires a JC.
The wisest course is probably just to avoid them. If you can't do that, then you must take refuge in the "I have doubts" course. That's officially acceptable, that is, not a DFable offense. The best course is, in the long term, to avoid being DFed or DAed. It will lead to greater possibilities and freedoms for you. If you get DFed or DAed, it will close multiple doors for you in the future.
Also you should not talk about your doubts/research with loyal Witnesses. That will lead to trouble for you.
If you really want to be left alone, this is the best course.