The difference is that the US Constitution is not, like the EU “Constitution” and many others, a compendium of laws aimed primarily at protecting the existence and privileges of the State.
It is short and relatively simple, and is based on principles (or values, you might say) that assert the primacy of the individual, based on his God-given nature, and thus mean that all laws based on the Constitution must protect not the State, but the individual.
The French Revolution and the American Revolution, while they may appear similar on a superficial level, were based on very different sets of values, and this is still true in the latter-day state successors of the French Revolution (among which, I would consider the EU).
My whole point is that we in the US have people who are working against our Constitution. Some of them are in the Left, and have been working against it for years, trying to relativize or diminish it; the newest threat is Islamic law. But the US Constitution is by no means worthless, and is our (and probably your) only hope for survival.
very well said.