I'm finding it hard to get excited about the proposed deal. It seems to be a standard business deal involving organizational services. If we really truly believe that it is a minority of Arabs/ Muslims that are fanatical, it stands to reason we can do business with those that aren't. They may even be better than us at ferreting out potential problems.
As to the argument that UAE banks were involved with 'financing' the 9/11 terrorists, I believe it was American flight instructors who taught them all how to run large planes without emphasizing take off or landing. It was American security, (FBI) who didn't make the necessary connections towards catching 'em. So what's your point?
Other arguments, such as our overall security and the way the present US Administration has chosen to apportion its resources, I'm not happy about. But this is low on the list.