Nah. I read through the thread.
@Wild Turkey is right and you're wrong. Rhaenys roasting them wouldn't kick off some big war or be awful because of regicide, kinslaying, or whatever excuse. She literally would have taken out all of the other side. The fuck is House Hightower gonna do? Their most important people just got axed and the other side HAS ALL OF THE DRAGONS. Anyone that has a problem with it would be shit out of luck. The Blacks would have all the dragons. You'd just have to sit there and eat it if you didn't like Rhaenys killing all the Greens.
And that's why its a completely stupid and contrived scene the writers never should have included. It defies any logic. There is no justification for it. It fails every scenario to even to try to justify it in universe.