Probably an old one.

[LANDROVER ROGER]

Everyone seems to be in such a hurry to scream 'racism' these days.

A customer asked, "In what aisle could I find the Irish sausage?"

The clerk asks, "Are you Irish?"
The guy, clearly offended, says, "Yes I am... But let me ask you something.
"If I had asked for Italian sausage, would you ask me if I was Italian?
Or if I had asked for German Bratwurst, would you ask me if I was German?
Or if I asked for a kosher hot dog would you ask me if I was Jewish?
Or if I had asked for a Taco, would you ask if I was Mexican?
Or if I asked for Polish sausage, would you ask if I was Polish?"
The clerk says, "No, I probably wouldn't."
The guy says, "Well then, because I asked for Irish sausage, why did you ask me if I'm Irish?"
The clerk replied, "Because you're in Halfords."

[numberplease]

[Crowth]

Best joke I've heard in a long time!