You could scream it in their face and they would never get it. Just look how they gloated hours before the vote.
I know - they have largely lost the power of reasoned thought. I see it almost every day when my wife starts laughing over the sheer nonsense posted by 2 of my particularly idiotic cousins from the Northeast (which, of course, necessarily means that I have other idiot cousins, but these 2 in particular are just batshit crazy).
There’s really not much hope for them...but what advantage is there in telling them? Why give them advice as to how to change for the better?