I don't know about racist, but there were a few things that raised my eyebrows about 2 (I never watched 3).
- Is the Union Jack deliberately smaller than the Stars and Stripes?
- Where the hell are the French, Chinese and Russians?
- Why is it always a Chinese city that gets destroyed in an alien invasion/asteroid apocalypse?
- The voice acting for some of the robots, especially the twins, was silly
- Is there an alien invasion film that isn't from the American perspective? I'm aware it makes sense strategically, but it's getting slightly repetitive. You'd think they'd send a few people after the French and the UK because of their nuclear arsenal, even something really minor, but we don't hear about anything else apart from American heroics and Hong Kong/Shanghai getting destroyed...