As usual, the media have distorted what is actually happening to make headlines (for more money, of course). No one is selling any US ports to an Arab nation. One non-US company is selling its commercial port facilities to another non-US company. The new owners, as the present owners, will have to comply with government regulations for security, pollution control, labor practices, etc.
Actually, most major corporations with headquarters in the US think of themselves as global corporations now. As daywalker said, this is happening all over the world. There are political theorists who say this is a good trend, since economic interdependence will prevent the outbreak of global warfare on the scale of WWII. Others say having key industries in the hands of foreign ownership will lead to the weakening of security in the Western World and actually increase the chances of warfare between the West and groups of Near East or Far East countries.
We can only hope the first group is correct.