Part of what is missed on many levels is where do our rights come from? Were did the founding fathers believe these rights they enumerated actually come from? The answer is they believed they came from the divine and were inalienable.
In other words the rights existed and have always existed. It may or may not be a statement of fact as to their origin but it is the very belief the nation was founded upon. In the core what I am getting at is I believe the founding fathers in general would have argued that although the Bill of Rights was changeable they felt the rights they spelled out were the essence of freedom.
Rights do not come from government, they have always existed. So in these words as I read them I also interpret that to mean that regardless of might be added these things were not to be eliminated...