It has to come from her, I wouldn't encourage you to do anything that could backfire on you.
You may want to discuss the situation, maybe over a bottle of wine. Something along the line of "I know you want to do what's right regarding your beliefs, but it's seems odd to me that your not willing to submit to what the GB suggests regarding DF'd people." " If you believe the GB speaks in behalf of J how do you reconcile this with your current behaviour"
Something along that line, you dont want to make her feel uneasy or defensive, it has to be a sincere desire you understand.