a) Repeat after me: China will NOT shoot at the US any time soon. The two nations are connected at the hip economically. They'll continue to play games with each other, for sure. there will be some sabotage, some espionage, some tensions, but China and the USA have the dollar bill version of Mutually Assured Destruction.
b) Both the Russians AND the USA have weapons in space regardless of treaties. How's that World War with Russia going?
c) How much did the USA expand their military budget last year? Or the year before that? Or before that? Heck, when's the last time it DIDN'T? How did that affect the ability of the last space race to allow a man to walk around on the moon?
d) Doesn't the tinfoil hat itch?
e) Given current sentiments(as demonstrated by your post) and the fact that the USA owes all the money, it's technically more likely the USA would act first. but again, see point a) for why this won't happen any time soon.