I need your help. My ex-father in law just demanded I take a post off Facebook because I was talking…

I need your help. My ex-father in law just demanded I take a post off Facebook because I was talking bad about my ex husband (I made a comment on a abuse video that everyone could apparently see), so my question is this. Should I delete all my ex-in laws off my Facebook so it'll be my private space again, so I can comment on what I want how I want, or let them stay and keep watching me??? I want my privacy back. 😑 Is that wrong????