We're not far from the day when non-Arab suicide bombers will be the rule, not the exception. Many will be from countries we count as our strongest allies. Some will be from America. When American terrorists start setting off VBIEDs and donning suicide vests, will you want to cut off U.S. firms from dockside management contracts?
"The Arabs" are not a team. Trying to treat them as one is a simple way to miss the point entirely.
You haven't heard of the ummah?
Think again.
The point is national survival. And it's not "Arabs" we worry about, it's Arab Muslims, and the UAE is an Arab muslim sheikdom who support people who kill our soldiers, the Taliban. They also side with Iran in their belief that Isreal has no right to exist as a nation.
What more "evidence" do you need that they cannot be trusted? Maybe another 9/11 type attack where we discover afterwards that the UAE helped them, AGAIN???