How many people that self-identify as liberal would agree that liberalism is "the erosion of the presumption of a privileged ontology"?

<1%. And that must be accepted as a criticism. However, I would contend that individual liberal battles can readily be perceived as fitting comfortably in this framing.

Also, in what way does the Ten Commandments rely on a "privileged ontology" that human rights does not?

I imagine you will agree that the concept of "putting presumptions under erasure" is not something that expresses itself well in dialog. You will notice that a hallmark of the occupy movement and human rights is that they are generally used vaguely.

This is because they "happen to categorize" the kinds of policies that are advocated when the rationalization of the status quo is put under erasure.

Now, I'll acknowledge that this framing fails because clearly powerful international organizations are asserting definitions of human rights.

I will suggest that this is a tool in the service of the paradigm mentioned, and then I'll acknowledge that this is a fully general counterargument.

And while I've explicitly lost the argument, allow me to ask you to hang onto it, because its corpse is still quite useful.