Hello Judge....
I admire your attitude towards them. I am still on speaking terms but they mostly leave me alone. When they come , they will want to put you on the spot to answer their questions. If you let them control the conversation they can tie a person up in knots and you would have to deny the faith completely to get out of agreeing with them.
Make them answer your questions. Employ a Socratic technique by giving them some unexpected questions to answer...
I agree with the advice to try and keep it friendly.....All the best.