It isn't about invasion its about the IP theft and industrial/scientific espionage. The China threat is extremely real, especially in high tech areas. The Chinese version of "collaboration" is "you innovate, we report to Beijing." The Chinese intelligence services are the most active in the world -- they make the KGB look like girl scouts. There's a reason for it. Spend some time doing business in China and you'll understand.
What are you afraid they're going to do? Suddenly they're as advanced as the US and then.... ? If they still can't innovate without us as some claim then nothing will change, their people will just be better off and they'll have gotten there a lot cheaper.
Personally I'd like to see the rest of the world catch up as soon as possible. I don't subscribe to the idea that for us to be happy people somewhere halfway around the world need to be miserable.
