rdb - I understand your displeasure at people using this particular phrase. However, I think a lot of it is simply shorthand for "Fine, if these whiners don't like living here in America, then it's fine by me if they GET what they seem to be demanding -- that the admittedly bad and painful past history that brought their ancestors to this country (and thereby gave them an opportunity to be here too) can be, as much as possible, completely undone. Let's buy these 'I'm-an-African-first-and-an-American-second' bed-wetters a plane ticket and let them go and live in whatever country they would have ended up living if their ancestors had never come to America, since that's what they seem to want."
It takes a long time to spell all that out, but I think it's what most people really mean.
Having said that, I'm sure for some white folks, it does express a bit of an us-and-them attitude ("us" being white folks, "them" being black folks). While some of this is simply a bad racial attitude (we all know bad racial attitudes are out there, so we may as well be up front with that), a fair portion of this, IMO, is probably a knee-jerk reaction to some of the us-and-them attitude expressed by liberal whiners like Jackson and Sharpton who are doing their very best to divide the world up into "us" vs. "them."
As far as I'm concerned, the world does to a degree divide into "us" vs. "them." "Us" includes you, me, and most of the folks here at FR. Not to mention folks like the Rev. Jesse Lee Peterson.
"Them" includes Clintoon, Hellary, Algore, Jesse Jackson, Al Sharpton, and most of the folks at DU...
The difference is in how we think and act.