Yup, it's a comin'

Rico says, courtesy of his friend Fish, this politically incorrect joke:

While waiting for their respective flights at the airport in Bozeman, Montana, three strangers strike up a conversation in the passenger lounge. One is a Native American, a Cheyenne passing through from Lame Deer, another is a cowboy on his way to Billings for a livestock show, and the third is an Arab student, newly arrived at Montana State University from the Middle East.
Their discussion drifts to their diverse cultures. Soon, the two Westerners learn that the Arab is a devout fundamentalist Muslim, and the conversation falls into an uneasy lull.
The cowboy leans back in his chair, crosses his boots on a magazine table, and tips his big sweat-stained hat forward over his face.
Finally, the Cheyenne clears his throat: "At one time, my people were many but, sadly, now we are few."
The Muslim student raises an eyebrow and leans forward. "Once my people were few," he sneers, "and now we are many. Why do you suppose that is?"
From the darkness beneath the cowboy's Stetson comes his smooth drawl: "Reckon that's 'cause we ain't never played 'Cowboys and Muslims' yet, but I do believe it's a-comin'."