Allow me to paraphrase a concept from Tolkien: evil doesn't win because it's a superior force, it wins because it convinces you that it's already won. "Look over there, evil wins. Look here, evil already won. Evil always wins, that's the way it has always been. You can't fight it so give up."
You can't win by spreading evil's messages, even sarcastically. You win by being a superior force and never giving up. People's credibility should actually suffer when they do or say things that are incredible, and people who appeal to us with facts and compassion should be rewarded.