Boy you said a mouthful here. I agree that we shouldn't scrap the documents, but certainly the "fear of ammending" them should be gone. Clearly they don't address all of the issuse in our complicated age. And they can't be expected to when one considers the time and era they were written in.
I honestly beleive there are some who want to return us to the stone age in many aspects. The world had changed since those great leaders wrote those words. We shouldn't abandon their intent, but we need to address todays realities.
But that document is amended, de facto, everyday by some Judge. In effect, the dems are amending that document to require a supermajority for federal judges. Can and should the Constitution be amended? Yes on both counts. But, our founding fathers made it so that willy nilly amending the Constitution is not easily accomplished. Hence why the document itself provides for a DEMOCRATIC process by which it can be amended.