I remember his mother and I would discuss, in those oft-remembered (much missed) quiet relaxed evenings before our son was born, television's role in our household. We'd pretty much decided that our offspring would never be sullied by exposure to the telly. Equally he'd never touch sugar, only eat organic and spend his life with well-thought through educationally relevant play. What mugs we were!
Limit yourself to just one argument on Christmas day. Your row could be about anything: Brexit, doing the washing up or even who’s better Ant or Dec, it really doesn't matter. Expect the argument, enjoy it and move on.