The obvious joke here is that, yes, it is because of the FOXP2 that George W Bush can communicate with modern humans. And, yes, it was very kind of George W Bush to donate his DNA to this study.
In seriousness, however, this is a very provocative study. It evokes so many images of a wild Asian subcontinent (Europe) teeming with all varieties of humanoids who lived peacefully for some time until, perhaps, circumstances forced them to compete for resources.
One wonders if this competition is what finally ushered in the age of warfare. Absent a distinct advantage that would allow one race to annihilate the other, war was inevitable.
That may well explain why having a Neanderthal president for eight years nearly brought the United States close to the edge of annihilation.