"Yeats wasn't much better himself, Aleister should've taken him down with him." Partial jealousy over the fact that Aziraphale likes Yeats' poetry, partially just disliking the man because he was kind of a fascist.

The fact this other Crowley took the name, too, earns a slight wrinkle of Crowley's nose. "Setting the bar real low if it was about Aleister, a rat could wear the name better." There are plenty of lovely rats in the world.