"The obvious question is: If it is dangerous for an Australian to travel to the UAE because of terrorism, isn't it even more dangerous for a company owned by UAE to own the rights to American ports where terror might be directly, or indirectly, imported?"
Whatever your position on this matter, that is a huge logical disconnect.
I thought the same thing - Australia warns against terrorist attacks coming from the UAE and we let them run our ports. It would almost be laughable if it weren't so damned serious.