Some advise: There will be times what you're arguing against does have some clear advantages that draws people towards it, those who be for it might even someone you deeply care about, learning to acknowledge the appealing part of what you are against is important to improving your debate skills
The residents of Gotham learning even if The Joker gets hit by a billion stars exploding, he won't die for good because he is a popular character and killing him off for real risks damaging sales: