He's still abusable. Regardless of class choice, all characters are abusable.
Have jesters walk by, and throw random insults in his general direction. Have shop keepers comment on his parentage/ancestry. There's always the racial slur. Lots of good dwarf insults abound. I'm sure you can find a few with a simple search here on ENworld.
The abuse can vary from minor indirect slander, to out-an-out sexual innuendo.
"A wizard you say? A decrepit dwarf wizard? Sheesh, the academy must be getting desperate these days."
"Look at him! All those wrinkles! No wonder they call him the walking prune! A living raisin on legs, if you ask me!"
"Hahahaha! Watch how he waddles! My staff and I, we'll give him a good reason to waddle!"