If certain rights are fundamental and the Constitution only enumerates those rights, wouldn't it be true that those rights are not subject to constitutional amendments? By enumerating those rights, the Constitution admits that it is subordinate to those fundamental rights.
Then the Constitution can't be amended, yet it says that it can be.
All we can reasonably do is look to those principles in interpreting the Constitution. Trying to use those principles to decided which parts of the Constitution may or may not be amended is a fool's errand.
It won't get us anywhere useful or important.