The California legislature just passed S.B. 107, a dangerous bill that undermines the fundamental right of every parent in every state to direct the upbringing of their children. It allows California courts to strip custody from parents — even parents who don’t live in California — who have legitimate concerns about a young child undergoing irreversible medical procedures to appear as a different gender. California wants to become a “sanctuary state” to which minor children from around the country can flee (or even be taken by someone else) to obtain on-demand puberty blockers, cross-sex hormones, or surgeries to remove healthy...