He raised you in a church with a history of failed prophetic mumbo jumbo before you were even born. Now he wants to 'out' his own kid for leaving his failed doomsday church. He needs to grow a pair and admit he made a mistake raising you in that church. If he hasn't got the cajones to do that, he can at least call the dogs off so that his actions don't require that he destroys his relationship with his kid.
Don't accept any responsiblity for his actions and make sure he knows that you are very disappointed that he chose to raise you in a church who's god has a long history of not doing anything that it's leaders pretend it is going to do.