A guy goes into a store and tells the clerk, "I'd like some Polish
sausage."

The clerk asks if the guy is Polish.

The guy, clearly offended, says, "Well, 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 chorizo, would you
ask if I was Mexican? Would ya, huh? Would ya?"

The clerk says sheepishly, "Well, no."

With deep, self-righteous indignation, the guy says, "Well, all right
then! Why did you ask me if I'm Polish, just because I ask for Polish
sausage?"

The clerk replies, "Because this is Home Depot."