A man goes into a store and asks the clerk for some "Polish Sausage."
The clerk looked at him and asked "Are you Polish?"
The guy, clearly offended, says "Well, yes I am. But let me ask you something. 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, huh? Would ya?"
The clerk says, "Well no."
"And if I asked you for some Irish Whiskey, would you ask me if I was Irish? What about Canadian Bacon, would you ask me if I was Canadian?"
"Well, I probably wouldn't."
With self-indignation, the guy says, "Well, all right then, why did you ask me if I'm Polish just because I asked for Polish Sausage?'
The clerk replies, "Because you're at a Home Depot, sir."