Take for example: "On the other hand, if, as it is now fashionable to maintain, the majority of voters in a democracy are prohibited from doing one thing—ending the democratic elective process itself—then this is no longer democracy, because the majority of voters can no longer rule."
It is still a democracy, because the majority of voters did not the surrender the power to make that decision to anyone, but in fact nobody is able to make that decision at all. There's no non-democratic entity who could decide so in place of the majority, because it is something that simply can't be changed. Every decision made is still made in a democratic process.
Just because you can't decide that the sun should drop out of the sky, does not mean you are not a democracy. It's simply another decision nobody can make. It's completely outside the scope of your democratic decision making.
Edit:
Another example would be a company in which all decisions are made in a democratic process. Well why can't its workers decide that murder should be legal? The obvious answer is that it is simply not a decision they can make, but is instead at the discretion of the country they operate in.
