Exactly that. You have claimed that redirection ability could potentially be a town role. So why did you vote bbninjas as scum using that logic? Why did you call him scum when you yourself already said that it could be a town role? By that logic, aren't you disproving your own theory and own evidence for voting bbninjas?
That begs the question, why did you still call him scum and vote for him? My theory to that is in my previous post: Your intention is to make out bbninjas as scummy and start or push a town lynch on him - and that's a scum tactic. There's nothing wrong with having theories like you did. The suspect thing here is that in a neutral situation (like the redirection ability), you immediately jumped to and stuck to the conclusion that is negative and paints someone else as scummy.