That's a stupid message to send. "You're either with us or against us." never works out well.
Eh, it's a pretty common message amongst irl revolutions/revolutionaries so I'm not mad from a story perspective, you know? Desmond Tutu: "If you are neutral in situations of injustice, you have chosen the side of the oppressor. If an elephant has its foot on the tail of a mouse and you say that you are neutral, the mouse will not appreciate your neutrality."
Although in this case we must also discuss the fact that the mouse in this case is a supernatural being that could set the elephant on fire if it weren't being crushed, but that speaks more about my dislike of the trope of using superpowered beings as metaphors for oppressed peoples when really it works best the other way 'round. Like Tevinter: you don;t have to prove to the magic person you're not harmful, the magic person has to prove they're not going to harm you.