>>There are people in my family who believe being gay will commit your afterlife to eternal torture, and it is their compassion that compels them to act in intolerance of people’s choice to love.

All you should have to do in cases like this is tell them you simply do not believe in the things they do and to not press it again. If they continue, things are obviously not coming from a place of compassion – they’re just selfish intolerant assholes.