"Irish Sausages" joke

So this bloke goes in shop and asks for Irish Sausages.

The Assistant looked at him and asked "Are you Irish?"

"If I asked you for Italian Sausage, would you ask me if I was Italian?"

"Or, if I asked for German Bratwurst, would you ask me if I was German?"

"Or if I asked you for a Kosher Hot Dog, would you ask me if I was Jewish?"

"Or, if I asked you for a Taco, would you ask me if I was Mexican? Would ya, ay? Would Ya?"

The assistant says, "Well no".

"And if I asked you for some Bourbon Whiskey, would you ask me if I was American?"

"What about Danish Bacon, would you ask me if I was Danish?"

"Well, I probably wouldn't,"

With self-indignation, the man says, "Well, all right then, why did you ask me if I'm Irish just because I asked for Irish Sausages?"

The Assistant replies, "Because you're in Bunnings."