As maybe be obvious, Buurt goes with the flow, more often than naught, as it's his current way. More so since he really, really doesn't care much for this town right now, as it seems to be just a lousy place with no spine to better its self.
Thus, why he's been following the party's choices, instead of making his own, as he feels he's just a slight bit bitter.
So, as with Leif and Scottley, A&B with knowledge that, if not for the good of the city, then for Oerth, the chaos beasties need be put down.