The assumption that the child does not want to live an orthodox lifestyle. What is a left wing modern orthodox parent to do when a child puts on a black hat, tzitzes and and a velvet yarmulka and will not drink the milk in the home. “
A child that puts on a black hat, tzitzis, a velvet yarmulke, and will not drink milk in his home, probably should have a decent grasp of the concept of kibud av, in that case. If not, then, all the things he is doing are pretty moot.