It's not a change of stance. I don't think he's scum. But what he is doing is asking to be lynched and with his role I can't safely guarantee that he won't shoot townies just because he can. As a result taking a kill away would make sense.
so this is your mindset:
i flip town - lynch ultra
i flip scum - lynch indigo
?
can you do same for ultra?
he flips scum - lynch tpein
he flips town (which he wont) - lynch me
which one is more logical to play for. you realize you are tying my scum flip to an indie/town slot. you havent even established who my teammates would be in this postion. im getting shafted even by tpein who should be following me