There is an awful lot of strange conjecture in here, little of which is based on anything but wave top new items and broad-brush generalizations.
Why is Iran our immediate current threat?
Where do you see widespread hatred for Israel in this country?
There is great folly in assuming that conflict with either Russia or China will be dependent upon conventional military force, or sheer numbers.
plus China and Russia are pretty far away from where we are. Folks often forget that the military build up for Desert Shield/Desert Storm and OIF were unopposed and easy shipping by sea.