So I paid for a month of HBO on Amazon and binge watched the whole Season 8 yesterday. Of course things can always be different but I enjoyed it. I think the most fitting ending in the spirit of that show would have been if the dragon went postal and killed the entire cast but there's really no way it doesn't toast Jon.
I believe the dragons were magically bred not to hurt a targaryen.
Jon is a targaryen.
So instead it slagged the throne so he couldn't have it (dragon logic).
Well it's one of two things I think. Either he saw a sword stuck in her and thought "that things made of swords" so he melted it, or those dragons are a heck of a lot smarter than we thought and he understood why John did it. Which is ok in a fantasy show but if so why did he go along with the massacre?
Just ignore it, it's supposed to make you all sad and crap and you aren't supposed to think about it too much. Which is why I immediately thought about it while watching, but the overall ending outshined the plot issues imho.
I probably need to give a shout out for the comic relief in the episode.... When that idiot cousin stood up again, they told him to sit down and he banged his sword on the pole I lost my ---steaming pile of meadow muffin---. Their reaction to Sam's "shouldn't everyone get to decide" was pretty good as well.