I think you can probably add the case where the USA did not support China's position in their little border war with Vietnam in 1980 as another item that soured the relationship.
Does the fact that a loose alliance once existed between the USA and China offer something to build on? I'd like to see relations improve, myself. Lets face it, in today's world, those two countries are your biggest heavy hitters. The lack of a perceived threat to both China and the USA means that future relations must be built on something else. For the time being, trade is the centerpiece to the relationship. Where does it go from here?
"It is well that war is so terrible, else we should grow too fond of it."
- General Robert E. Lee
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"It takes a big man to admit when he's wrong. I am NOT a big man." -Chevy Chase