Yes, it would be a sin. In my case, I can hardly gloat. We are on the losing side. I see my approval of her “being hoisted on her own petard” as being just desserts, actual justice, not gloating.
Similar to someone who is doing something stupid who has the suggestion made that they should do something differently. Not only being ignored, they ridicule the person making the suggestion, then it comes to pass that they are injured. I think it is perfectly possible to view with sympathy the injury, yet at the same time temper it with the “grim satisfaction” that their failure and injury may serve as an object lesson to others pursuing something equally stupid.
Such as supporting liberalism and nanny statism.
But that is just me.
Sometimes, one’s great purpose in life, is to serve as a warning to others.
Not referring to you, my FRiend; but you do hear a lot of it on Deen threads. Sad.