The UAE is not entitled to large swaths of our economy simply because it is the UAE, any more than other foreign nations are entitled to those segments of our economy.
Simply because there are other countries deracinating their industrial base does not mean that we should follow suit, or that their policies are necessarily the best ones.
Guess what. You're not king of the world, so you don't get to say who buys what. The UAE will buy Doncasters whether YOU like it or not. They may carve out the subsidiary that makes stuff for us and sell it to some lily-white firm in order to satisfy the xenophobes.
You need to come up with a list of who can, and cannot, buy what.
It is entirely a question of stabbing in the back our ally. There is nothing coming out of this strain of hysterical ignorance BUT damaging our allies and us.