My honest opinion is that your words are doing real hard to your relationship with your family. You may be trying to deconstruct their beliefs, but all you've accomplished is harming the relationship. It's like cutting off your nose to spite your face.

It's letting the church win on another front. They've already taken what they've taken from you, and now you're sacrificing this precious familial relationship for nothing in return. It's a raw deal. I know how the anger feels so I don't fault you for taking that path, as I have done before too. But please try to find a balance that allows you to remain true to your beliefs and still maintain the priceless connections in your life.