I doubt that the chinese military is sending massive numbers of spy's, or soldiers to the US. I bet most of those folks trying to get in, are just trying to escape China. Those are potentially the people that can think for themselves, and won't toe the communist line, and know that they have to get out in order to stay alive. I'm sure several of 'em make some bomb ass general chicken and fried rice, both of which I never get tired of eating.
But lets just say that they're agents sent to engage in either terrorism, or counter intelligence. What intel are they going to get that they can't get via sigint, and satellites? Do they need 10's of thousands of spies to try to build a network of human intelligence? Our country is just as active looking in as it is out, for intelligence and anti-terror efforts, we might miss some of the spies, but I imagine most will be discovered.
Creating chaos inside the borders of the states doesn't create chaos in the federal government, there are too many layers of management. They'll always be handling foreign relations and security, while directing states to handle the internal issues, and directing FEMA to assist in directing federal aid and/or resources. But they won't take the eye off the ball. The Gerald Ford battle group isn't going to be redirected back to that shores of the country to provide aid here, they will remain wherever they are, focused on their mission.
If we got into a conflict with China, either they started to get to handsy with Taiwan, or they were caught actively participating in an attempt to subvert the US goverment from within out borders, we wouldn't have to bomb them, send missiles, or shoot guns at 'em. We can just sanction them for a while. Cease food exports, energy exports, a lot of the things that they need from us because they aren't getting adequate supplies elsewhere. We can squeeze them without putting any soldiers at risk, and with minimal political risk. There is zero risk of China sending a fleet across the pacific to our shores because the flat out don't have the heavy lift capability to do shit to the CONUS.
Anyway...i'll get off my soap box. Just stating my opinions on that matter.
Branden