Purity is not well defined in the game; it could mean purity as in ideal christianity, which would make for gentle and forgiving Inquisitors, or it could mean purity as in zealous doctrinal cleansing--which would make for vigorously bloodthirsty Inquisitors. Depending on which version CA has in mind, the triggers may be right, or may be backwards. But I don't know that we have any evidence of what their definition of 'purity' is.