Crazyguy,
Your son sounds like he wants to please both you and his mother. Could he be very confused right now? It's awful they way WT is manipulating pre teens and teenagers.
When you speak with him highlight to him to really be honest with you about his feelings and say you respect his beliefs and choices, but want him to be honest with you. It's only from real openness and honesty can you get through to him.
I am sorry you are having to go through this.
Kate xx