Jerome,
Have you considered that maybe you ARE getting through to them, only they CAN'T let you know it. You see there is a REASON that JW's always work in pairs. They simply are afraid - because of the df/shunning thing - to let their partner KNOW how they really believe if it differs from what the WT puts into print. If one of them were to admit in front of their believing partner, that you DID have a valid point, that other JW would run to the elders and tattle. The end result would be that the doubting JW would get into a heap of trouble and may even be df'd. The price of agreeing with you is just too high. So both JW's continue to spout the party line.
That may be the reason that you have been able to converse with your girlfriend so sucessfully. She doesn't have any other JW's around to hear what she is thinking and saying to you. BUT if you were to hold the same conversations with your girlfriend while her parents were listening in, it may not go so well. She would feel that she HAD to also spout the party line in front of her JW parents.
I would suggest that you go VERY slowly when inter-reacting with her JW parents. It may be well to avoid the subject of religion altogether. Just try to impress her parents with your good morality and Bible based life-style. Let them get to know you as a person before you even THINK of trying to show them how wrong the WT is. Let THEM teach you about the JW faith, while you just "play dumb" for awhile. Ask only those types of questions that will force them to see the contradictions for themselves while doing research to answer your questions. Plant little seeds of doubt. Avoid the "big" topics. Ask about holidays, the cross vs the stake, the name Jehovah in the NT etc. You might mention to them that you just happen to have heard that when Russell was their leader, he thought that it was ok to celebrate Christmas. Ask them to find out for you WHEN celebrating Christmas first became a no-no. Ask them to show you some Scripture that forbids the celebrating of holidays. You could mention that the Jewish faith sure had lots of holidays to celebrate in the Bible. If it was ok then, why not now? Stuff like that.
The bottom line here is that if you are too honest with your girlfriends JW parents, it will force your girlfriend to choose between following her parents wishes or turning her back on her parents. She will probably choose to let you go rather then lose all of her family.
NewLight2