Why is the president of the United States entertaining Abu Dhabi’s crown prince, Sheik Mohammad bin Zayed Al Nahyan, at Camp David when his own State Department has singled out the Sheik’s homeland, the United Arab Emirates (U.A.E.), for its continuing violations of human rights? Abu Dhabi is one of seven oil-rich — and anti-Israel states — in the U.A.E. Using its massive sovereign wealth fund of over $875 billion, Abu Dhabi has been gobbling up American assets, buying considerable stakes in U.S. businesses like Citigroup, the Carlyle Group, Advanced Micro Devices, and Toll Brother and is now bidding on...