I think this is where many are getting confused. Most people aren't in a position (myself included) to fully understand the difference between "terminal" and "port" and how they work.
Terminals are in effect subassemblies of ports. That is terminals make up ports. While many are trying to blur the issue by implying the UAE company wants to manage six ports in the U.S. (New Orleans, Baltimore, etc.) the fact is it's only a handful of terminals in each port. The majority of terminals in those ports would not be managed by the UAE company at all. But explaining that isn't helpful to those against this deal because it lessens the hysteria value that comes from the belief that the entire port would be under the control of an Arab country.