I think a simple part of the problem is that fascism "has it easy" when it comes to messaging: they get to scapegoat easy targets, and appeal to populism. We do not have the luxury of such easy-to-consume messaging. This is also why our memes get made fun of for being wordy or hard to understand, whereas right-wing memes can be easily distilled to "haha minority bad."
We're also fighting against decades of entrenched liberal propaganda in each individual we try to reach, whereas fascists get to build upon that foundation.
Yes, I understand that. What I am trying to say is that they are dismissing the song's impact as if every view was from a bot, when they are not. Real people are listening to and talking about it.