There is an old feeling which basically says “a child grows into their teens and becomes a monster, goes off and comes back a human being”. What this means is as a child grows up it is natural that they become a giant pain in the rear as they break away from their parents. It makes the separation more tolerable for both parties. After the separation they usually re-bond. It was that way with my three daughters. As part of the separation process the child may reject their parent’s values. If the parents are conservative the kid becomes a liberal and vice versa. Let him establish himself as independent and he may return to his parent’s conservative roots.
Correction: an old saying, not feeling.