I know what you're thinking: i'm going to talk about the 'black' robots, right? Wrong. Instead, I'm going to cover a much less insidious, but still sad moment in Foreign/American relations.
Near the beginning of the third act, our heroes are trying to cross the border into Egypt. They got stopped at the border by the guards. The head guard is played by Deep Roy. You may know him as the Oompa-Loompas from Charlie and the Chocolate Factory.
The reason why this is bad is a little less than obvious: Deep Roy is Kenyan. Just like our President (I'm kidding), the man is most assuredly not from Egypt. I know they're both in Africa, but...really now. You couldn't get any Egyptian actors? You spent over $200 million to create talking cars that fire lasers, but you can't get any Egyptian actors?
I should also mention that this scene serves no real point, save for setting up something that could have been done 6,000,000 other ways.
By the way, the 'black' robots are terrible. Why does one of them have a gold tooth? Why do any Transformers have teeth to begin with? This is especially bad when you consider that they one of the two robots is voiced by Tom Kenny (aka the voice of Spongebob Squarepants). Really now!
Up next, a racial issue brought by a Downey, but not the one that you might think. Stay tuned...