Think back what you remember and felt about apostates?
She goes to the meetings and all she hears is God will destroy those opposing him, God will kill his enemy's, Satan and his minions are toast. So we have become everything they despise, in essence she is sleeping with the enemy and your trying to destroy her faith.
She is pissed because you become too wise in your own eyes, you think you know more than God's himself. You are no longer the spiritual man she fell in love with, the spiritual man that will lead her family into the new world, that would be at her side to rebuild a perfect society and live in perfect harmony along side God. The father and husband that will help reunite the resurrected with those grieving, that will teach those new one the grander of your creator and his promises. The man that will hold her forever and together explore every desire of your heart.
This is what you have taken from her, this is the power of this Cult. This is what we are up against.