Ho-hum. The Dubai conglomerate is a big multinational with a proven management record. International business long ago passed oil as the major income generator for Dubai; even its luxury hotels exceed the oil figure.
The security nonsense is a red herring. As with the former British managers, the U. S. will continue to handle security in the ports.

Next thing you know someone will worry about Nestle's (Swiss) control of many U. S. foods and liquors because part of the ownership seems to be in the hands of Arabs- gee whillikers, they are going to poison us! And the Chinese will worry about being poisoned by Starbucks coffee as the Washington concern tries to supplant the 'tea in China' with their product.

We live in a multinational world and must learn to live and work with it or crawl into a shell.