Having a Dubai firm run our ports is not less foreign or dangerous that having a London firm run out ports. The objection to Dubai Ports World was entirely that the ultimate owners were Arabs who wore Arab dress. That is racism.
If we don't distinguish between good Arabs and bad Arabs (and the thousand shades of indifferent Arabs), we will make our relations with all Arabs worse. This will come back to bite us right away.
For example, Mohammed Taheriazar, the University of North Carolina at Chapel Hill student who tried to run over a group of fellow students did so because all Americans are enemies of Allah. We think he is deranged because he does not distinguish between Americans who are enemies of whichever terrorist faction he identifies with, and ordinary beer-swilling American students who had not given his cause a second thought.
If we are really interested in peace around the world, we should be looking for people in every country and nationality who we can work with. When every nation knows some "good Americans" and we know some "good (fill in the people)" in every nation, the world will be safer and more stable.