He’s grown now. Your job of raising him is over. But you will always be mom and dad.
Put the politics and differences aside. Let someone else be the voice of reason in these areas. If he wants your opinion, let him ask for it respectfully. Be open, but don’t compromise your beliefs.
If there are any things you have done wrong, be honest and candid in admitting this.
Learn from your mistakes when dealing with your daughter or any other family members.
Let your son know you love him and are always there for him. Your love and acceptance must be unconditional. He should know this. And BOTH of you need to verbalize this.
Study the Bible. Learn to articulate your beliefs based on its authority to those who accept it. You may have an opportunity to do so with your son. Let him know you are glad he is seeking God, even if you disagree about many things. Find some common ground there if possible.
Pray. Ask God to bring positive influences into your son’s life. Ask God to keep evil people away from him.
Seek to please God in your own lives. Perhaps God will bring your son back to you in His time.
Praying is the best solution when this difficulty occurs. I Pray for one of my Sons - Gregory - that he opens his heart to Jesus Christ. I have let Jesus into my heart and I am better because of it.
Send Love and Prayers. Bless you and your Son.