and the missile defense system (ground-based or space-based, missile or laser) would violate the 1972 ABM Treaty
It would if the ABM Treaty still existed.
However, the treaty no longer exists.
When Bush II first mentioned the orbiting missile platform, its purpose was defensive. I'm unaware of any change in that (though the military is no doubt examining the feasibility of space-based offensive weapons).
I have heard Bush Sr.
propose defensive missiles in space. But the only space missiles I've heard Bush Jr. propose are offensive weapons for attacking ground targets.
If most of the rest of the world did decide to kick the US out of the playground by waging economic war against us, then we would be hurt more than the rest of the world.
That is incorrect. Any harm to our economy will do even more harm to the rest of the world.
And none of the world's governments wish to kick us out of anything.
We are no longer the principal producer nor the principal consumer of the world,
When did we stop being the principal consumer?
Given the global economy, I don't think there is going to be a principal producer anymore.
One might argue that the US is the economic superpower of the world, and this is true, but much of US capital is tied up in other countries. What's to stop those countries from simply expropriating that US capital?
Any nation that tried such a thing would become a rogue nation and be shut off from the world economy.
If the US attempted to react militarily to secure the resources it needs, and Russia and China (not to mention many of the smaller countries) stood against the US militarily, then the US would lose.
That is not so. We could easily destroy the forces of such a coalition.
Our military is spread thin
It can be redeployed easily enough.
and, since our most important imported resources come from locations in Asia, we would have to transport supplies, equipment, and reinforcements much farther than Russia and China would
We are capable of transporting our forces anywhere in the world.
China and Russia are not capable of transporting their forces outside their own borders.
(just look at the fiasco our troops are facing in Iraq just getting the necessary armor plating and other equipment there).
That is mostly due to political incompetence.
In addition, China, whose military's larger than the US's,
Larger in numbers is meaningless. They have no military power on the scale of our military.
is currently (and quickly) upgrading its military with the latest technology, arms, and equipment (purchased mostly from Russia).
China has a LONG way to go before they have upgraded themselves into a competent fighting force.
Russia's military, while not at its Cold War level, is still formidable.
Not by my definition of formidable.
If they stood together, they would most likely be able to block US military intervention in Asia.
If they stood together against us, they'd die together.
As for who has what nuclear missiles: it doesn't matter that we have enough to take out the world even if Russia took us out; we'd be crazy to use them. The point is that because Russia and China (yes, Russia has many, China has few) have enough nuclear might to wipe us out, we would be forced to fight a conventional war rather than a nuclear war.
Only Russia has enough nukes to wipe us out.
And there is no such thing as a conventional war between two nuclear powers.
We'd decimate their conventional forces, and that would trigger a nuclear war.
Don't underestimate anti-US sentiment in the world. They would rather we stayed and played by the playground rules, but that doesn't mean there isn't a point where they'll get sick of the US playing by its own rules and kicking dirt in the face of the other countries.
I am aware of anti-American bigots among the foreign populace.
I am also aware that such bigots are not in the majority in any country. And such bigots do not have control over any of the world's governments.